Sunex 3/8-Inch Impact Socket Set Breakdown: Spec & Profile Comparison

Best for: General automotive repair requiring core metric sizes

Pros

• 14 standard and 14 deep sockets
• Includes universal swivel joint
• Durable blow molded case

Cons

• Skips 20mm metric sizing

Best for: Complete automotive shops needing dual-standard coverage

Pros

• 80-piece comprehensive inventory
• Standard deep and universal sockets
• Laser etched and roll stamped markings

Cons

• Heavy 19-pound storage footprint
• Skips specific oversized fasteners

The SUNEX Tools 80 Piece 3 8, designated as model sunex 3580, functions as a definitive dual-standard master collection for professional garages. This kit spans SAE measurements from 5/16-inch to 3/4-inch and metric sizes from 8mm to 19mm. By incorporating standard depth sockets, deep sockets, and 360-degree universal sockets for both measurement systems, it ensures technicians do not have to stop mid-job to locate missing socket depths. The set also integrates specialty star and inverted star sockets, four extension bars, and an impact universal joint.

Engineered from forged chrome-molybdenum alloy steel, the sockets in the sunex 3580 master set absorb high-torque impacts while resisting broach deformation. The patented radius corner design drives fastener flats rather than fastener corners, significantly reducing the risk of rounding off seized hardware. Chamfered openings facilitate fast fastener engagement, which accelerates production workflows. When technicians consider sunex impact sockets for full-service bays, this 80-piece model eliminates the need to source separate metric and fractional sets.

Dual markings featuring both high-visibility laser etching and permanent roll stamping ensure each socket remains identifiable even after years of shop exposure. At a total weight of 19 pounds, the included heavy-duty blow-molded case offers rugged storage, though its physical dimensions require significant bench space or a dedicated roll-cab drawer. Mechanics who work strictly on modern import platforms may find the fractional SAE inclusion redundant, but for general automotive environments, it provides unmatched all-in-one breadth.

• Comprehensive 80-piece inventory covering SAE 5/16-inch to 3/4-inch and Metric 8mm to 19mm
• Standard, deep, and universal swivel configurations alongside star and inverted star sockets
• Radius corner design with chamfered openings to protect fastener corners and speed alignment
• Heavy-duty blow-molded storage case with dual laser-etched and roll-stamped markings

Best for: Dedicated metric automotive service technicians

Pros

• No skipped sizes from 7mm to 22mm
• 360-degree universal sockets included
• Black phosphate corrosion resistance

Cons

• Excludes SAE fastener sizing

The SUNEX TOOLS 3351 represents an unbroken 51-piece metric service solution tailored for modern import and domestic automotive maintenance. Spanning from 7mm up to 22mm, the sunex 3351 eliminates skipped sizes entirely, providing technicians with standard length, deep wall, and integrated universal swivel sockets across the complete size spectrum. For shops servicing foreign vehicle platforms, this uninterrupted metric sequence prevents downtime caused by missing interim sizes like 16mm or 18mm.

Each socket in this sunex master impact socket set is forged from chrome-molybdenum alloy steel and finished with an industrial black phosphate coating for maximum corrosion resistance. The integrated universal sockets provide 360-degree rotation at up to a 30-degree working angle, permitting direct impact gun access around subframes, exhaust manifolds, and steering knuckles. By avoiding loose swivel adapters, torque transfer remains efficient and wobble is minimized during heavy unfastening operations.

Dual size markings combining laser etching and permanent mechanical stamping ensure identification remains legible through greasy shop environments. Weighing 11.3 pounds in its blow-molded storage case, this set is considerably more portable than larger dual-standard master kits while retaining all metric necessities. Where it yields to the larger 80-piece kit is its complete omission of SAE fractional sizes, making it an improper fit for heavy agricultural, vintage domestic, or industrial infrastructure.

• Continuous 51-piece metric run from 7mm to 22mm without skipped sizes
• Standard, deep, and integrated 360-degree universal sockets in every primary metric size
• Forged Cr-Mo alloy steel construction with protective black phosphate finish
• Dual size identification featuring high-visibility laser etching and permanent stamping

Best for: Technicians servicing specialty fasteners and European vehicles

Pros

• 84-piece specialty bit configuration
• Stubby mid and long lengths
• Includes triple square and tamperproof

Cons

• Contains no standard hex sockets

The Sunex 3569 3 8″ Dr. Master is an 84-piece specialty driver bit system engineered for technicians who routinely service internal drive fasteners. Known as model sunex 3569, this massive set consolidates hex, star, tamperproof star, external star, and triple square bit sockets into long, mid, and stubby lengths across both SAE and metric formats. It addresses modern drivetrain, brake caliper, interior console, and suspension hardware that standard 6-point sockets cannot interface with.

Forged from chrome-molybdenum alloy steel, these impact-grade driver bits deliver the torsional resilience necessary to break loose stubborn, thread-locked fasteners without shearing drive tips. Technicians servicing European platforms from Volkswagen, Audi, BMW, or Mercedes-Benz frequently encounter triple square and tamperproof fasteners where conventional hex keys fail under impact loads. For technicians pairing their setup with cordless impact guns, such as those evaluated in a dewalt impact wrench socket set comparison, having impact-rated specialty bits prevents dangerous bit fracturing.

Weighing 10.4 pounds, the heavy-duty organized case maintains clear slots for every bit length, preventing lost pieces in busy workshop stalls. High-visibility laser etching allows swift distinction between fractional and metric hex sizes. Because this set focuses strictly on driver bits and external star sockets, it does not include standard external hex sockets, requiring users to pair it with a dedicated socket set like the 3351 or 3329 for full utility.

• Comprehensive 84-piece bit collection containing hex, star, tamperproof, and triple square configurations
• Engineered in stubby, mid-length, and long profiles across SAE and metric fastener applications
• Constructed from heavy-duty Cr-Mo alloy steel finished in black phosphate
• Includes heavy-duty blow-molded carrying case with high-visibility laser markings

Best for: Industrial mechanics maintaining SAE machinery

Pros

• 12-point design doubles starting points
• Full standard and deep SAE runs
• Includes universal joint accessory

Cons

• No metric fasteners supported

The SUNEX TOOLS 3326 3 8-Inch Drive caters specifically to industrial, agricultural, and vintage mechanical maintenance where fractional imperial hardware remains the primary standard. Designated as model sunex 3326, this 25-piece package contains twelve 12-point standard sockets, twelve 12-point deep sockets, and a dedicated 3/8-inch universal joint. The size range spans continuously from 5/16-inch to 1-inch, delivering robust fractional coverage without unnecessary metric overlap.

The 12-point geometry offers double the starting points compared to traditional 6-point sockets, allowing rapid fastener engagement in cramped engine compartments or machinery bays with restricted swing clearance. Forged from high-grade chrome-molybdenum alloy steel, these sockets withstand repetitive impact hammer cycling while the blow-molded storage case organizes each piece cleanly. The included universal joint expands access around bulkheads and structural brackets.

Weighing 7.7 pounds, the 3326 is lightweight and easily transportable in service trucks or mobile maintenance carts. The listing does not specify dual-etched markings for this model, relying instead on clean stamped dimensions. Technicians working in commercial facilities often balance this setup alongside tools like a milwaukee 3/8 impact socket set to ensure full compatibility across multiple toolboxes. However, because it is strictly 12-point SAE, it is unsuitable for automotive technicians working primarily on metric vehicles or high-torque rounded hex fasteners.

• 25-piece SAE master set spanning 5/16-inch to 1-inch sizes
• Twelve standard and twelve deep 12-point sockets for fast 30-degree fastener indexing
• Includes dedicated 3/8-inch impact universal joint for angled access
• Constructed from forged Cr-Mo alloy steel housed in a heavy-duty blow-molded case

Best for: Tight clearance hex bolt service

Pros

• Low profile compact form factor
• Solid one-piece Cr-Mo construction
• Dual SAE and metric coverage

Cons

• Limited to 16 hex drivers

The Sunex 3646 is an ultra-compact 16-piece low-profile impact hex driver set built specifically for tight clearance challenges. Model sunex 3646 features solid one-piece construction forged from chrome-molybdenum steel, completely eliminating the two-piece pin or press-fit design that commonly shears or separates under heavy rotational vibration. The set delivers dual coverage, supplying eight SAE sizes from 1/4-inch to 3/4-inch and eight metric sizes from 6mm to 19mm.

The stubby low-profile design allows mechanics to insert impact drivers into narrow gaps where conventional two-piece socket bits or standard impact extensions cannot physically clear surrounding frame rails, brake hardware, or transmission housings. Sunex incorporates its radius corner design on the hex drive profiles, placing contact force against fastener wall flats rather than fragile edges. This significantly preserves internal hex fastener integrity under repeated high-torque pneumatic applications.

Dual size markings featuring both laser etching and mechanical roll stamping ensure permanent identification despite continuous exposure to degreasers and brake clean. At just 2.3 pounds, the set is exceptionally portable and fits cleanly into a service cart drawer in its included heavy-duty blow-molded case. With 16 total drivers, it gives way to the 84-piece 3569 set when extended reach or specialty star and triple square drives are needed, serving strictly as a dedicated low-profile hex solution.

• 16-piece low-profile hex driver set with solid one-piece Cr-Mo construction
• Includes eight SAE sizes (1/4-inch to 3/4-inch) and eight Metric sizes (6mm to 19mm)
• Ultra-stubby form factor provides access in severely restricted physical clearances
• Permanent dual markings with laser etching and roll stamping in a compact case

The Sunex Tools 29-piece metric impact socket set, cataloged under model sunex 3329, delivers an essential collection of standard and deep 6-point metric impact sockets designed for everyday automotive maintenance. Covering fastener sizes from 8mm to 22mm, the kit supplies fourteen standard length sockets, fourteen deep wall sockets, and an impact universal joint. It focuses directly on the most common fastener sizes used in brake, suspension, chassis, and engine bay service.

Manufactured from premium chrome-molybdenum alloy steel, the sunex 3329 handles continuous impact hammer action without cracking or splitting. The set features a clean progression across 8mm through 19mm, then steps directly to 21mm and 22mm, omitting 20mm which is rarely encountered in standard automotive work. The included 3/8-inch drive universal joint allows angled engagement on recessed fasteners without requiring separate articulation accessories.

Weighing 8.1 pounds in its heavy-duty blow-molded storage case, the 3329 provides an ideal balance of comprehensive metric capability and field mobility. It yields to the 51-piece 3351 set by omitting dedicated individual swivel sockets and the 7mm size, but represents a streamlined, clutter-free choice for technicians who already own specialty drivers and simply need reliable metric sockets for routine repair orders.

• 29-piece metric inventory containing 14 standard sockets, 14 deep sockets, and 1 universal joint
• Spans 8mm to 22mm metric coverage focused on everyday automotive repair
• Forged Cr-Mo alloy steel construction for extended tool life under impact duty
• Durable blow-molded storage case keeps sockets organized during mobile transport