Proto J52211 Metric Socket Set 21 Pc 3/8 Drive 6-26mm

Product Description

The PROTO J52211 is a 21-piece metric standard socket set built for professional tradespeople who need reliable, accurate fastener engagement across a wide range of metric sizes. The set runs from 6 mm to 26 mm and uses a 3/8 inch drive, a versatile drive size that bridges the gap between compact 1/4 inch and heavy-duty 1/2 inch work. Each socket features a 6-point design for maximum contact on hex fasteners, reducing the risk of rounding. The chrome finish resists corrosion and makes sockets easy to wipe clean in shop or field conditions. At 3.36 pounds, the full set is compact enough for a tool bag without sacrificing coverage.

This set is suited for mechanical, HVAC, plumbing, and electrical service work where metric fasteners are the standard. The 3/8 inch drive is common on mid-torque ratchets and torque wrenches found in commercial and residential service environments. Technicians working on equipment panels, mechanical rooms, rooftop units, and similar installations will find the 6 mm through 26 mm range covers the majority of metric hardware encountered in the field. The set is appropriate for both shop bench work and on-site service calls.

Key Features

• 21-piece set covers 6 mm to 26 mm in metric sizes
• 3/8 inch drive fits standard mid-torque ratchets and torque wrenches
• 6-point socket geometry reduces fastener rounding on hex hardware
• Chrome finish provides corrosion resistance and easy cleaning
• Compact 3.36-pound total weight suitable for tool bags and service kits

Compatibility

Designed for use with standard 3/8 inch drive ratchets, extensions, and torque wrenches accepting industry-standard 3/8 inch square drive tooling.

Installation Notes

Socket sets do not require installation, but proper use and storage practices extend service life. Always match the socket size precisely to the fastener to avoid rounding. Inspect sockets for cracks or deformation before use, and do not use impact-rated loads on standard chrome sockets unless the tool is rated for impact service. Store in the provided tray or a clean, dry location to prevent corrosion and loss.