Wera 05071101001 Hex Insert Bit 1/4 in Drive 3mm 89mm

Product Description

The WERA 05071101001 is a metric hex screwdriver insert bit designed for use with 1/4 inch drive tools. It accepts standard hex fasteners and delivers torque directly to the fastener head with a straight, non-ball-end tip for maximum contact and reduced cam-out. The bit is machined from stainless steel, making it resistant to corrosion in wet or chemically active environments. At 89 mm overall length, it provides extended reach in recessed or obstructed fastener locations. Suitable for HVAC panel assemblies, electrical enclosures, plumbing fixture installations, and general mechanical work where metric hex fasteners are specified.

This insert bit is used in applications requiring metric hex drive fasteners, particularly in residential and light commercial trade work. The 3 mm hex size is common in equipment panels, motor mounts, valve assemblies, and access cover fasteners. The 1/4 inch drive shank fits standard power screwdrivers, impact drivers, and hand driver handles with a 1/4 inch hex chuck. Licensed technicians and journeymen across HVAC, plumbing, and electrical trades will find this size relevant to equipment service and installation tasks.

Key Features

• 3 mm hex blade width for metric fastener applications
• 1/4 inch drive shank fits standard hex chuck drivers and bit holders
• 89 mm overall length provides extended reach into recessed fastener locations
• Stainless steel construction resists corrosion in wet or chemical service environments
• Straight tip design maximizes fastener contact and reduces cam-out compared to ball-end bits
• Single-piece packaging - sold individually

Compatibility

Designed for use with any 1/4 inch drive screwdriver handle, power screwdriver, or impact driver equipped with a 1/4 inch hex bit chuck. Accepts metric hex socket head fasteners with a 3 mm drive size.

Installation Notes

Insert bits should be fully seated in the driver chuck before applying torque. Inspect the bit tip for wear or deformation before each use - a damaged tip can strip fastener heads. When working inside energized electrical enclosures, follow NFPA 70E arc flash and shock hazard protocols and use appropriately rated insulated tools where required. Replace the bit if the hex profile shows visible rounding or wear.