Wera 05003971001 Metric Hex Bit Socket Set 3/8 in Drive 8 Pc

Product Description

The WERA 05003971001 is an 8-piece metric hex bit socket set designed for 3/8 inch drive tools. The set covers the most common metric hex sizes used in mechanical and trade work, ranging from 3 mm through 10 mm. Each bit socket is engineered to transfer torque from a standard 3/8 inch drive ratchet or extension to internal hex fasteners without slippage or rounding. HVAC technicians, plumbers, electricians, and general mechanical contractors regularly reach for hex bit socket sets when servicing equipment panels, flanges, and fastener-heavy assemblies. The set weighs approximately 1.04 pounds, making it compact enough for a tool pouch or service bag.

This set is suited for both residential and light commercial service work where metric hex fasteners are common. Typical applications include equipment access panel removal, compressor and pump service, electrical enclosure work, and general mechanical assembly. The 3 through 10 mm range covers the majority of metric internal hex fasteners encountered in HVAC, refrigeration, plumbing, and electrical trade work. The 3/8 inch drive sizing balances torque capacity with accessibility in tighter service spaces.

Key Features

• 8-piece set covering 3, 4, 5, 6, 7, 8, 9, and 10 mm metric hex sizes
• 3/8 inch drive compatibility works with standard ratchets, extensions, and torque wrenches
• Hex bit socket design engages internal hex fasteners fully to reduce cam-out and fastener damage
• Compact set weight of 1.04 pounds for easy portability in a tool bag or pouch
• Covers the full common metric hex range for trade and mechanical service applications

Compatibility

Designed for use with standard 3/8 inch drive ratchets, extensions, and torque wrenches. Compatible with metric internal hex fasteners from 3 mm to 10 mm across HVAC, plumbing, electrical, and general mechanical applications.

Installation Notes

Hex bit sockets should be seated fully onto the fastener before applying torque to prevent rounding of the hex recess. Ensure the drive ratchet or wrench is rated for the torque required by the fastener specification. When working on electrical or HVAC equipment, de-energize and lock out the system before removing fastened panels or components. Inspect each bit socket for wear or deformation before use on critical fasteners.