Wiha 75816 Screwdriver Insert Bit 4mm Drive 28mm Oal

Product Description

The WIHA 75816 is a precision single-end screwdriver insert bit designed for use with 4 mm drive bit holders and compatible power or hand tool systems. With an overall length of 28 mm (approximately 1.1 inches), this compact insert bit fits standard bit holders used in tight-access fastening applications. The hex shank measures 3/16 inches for secure seating in the driver. Non-magnetic and non-insulated, this bit is built for precision mechanical assembly work where a slim, direct-drive profile is required. Licensed trades and mechanical technicians reach for this style of insert bit when working in confined spaces where longer bits or full-handle drivers cannot reach.

This insert bit is suited for precision assembly and service tasks across electrical, HVAC, plumbing, and general mechanical applications where a 4 mm drive insert is specified. Its single-end design keeps the profile short and manageable for use in bit extension systems, right-angle adapters, or standard 1/4-inch hex chuck drivers. Typical install scenarios include panel assembly, equipment service, and field repair work requiring controlled fastener torque in tight quarters.

Key Features

• 4 mm drive size for use with compatible bit holders and extension systems
• 28 mm overall length for compact, tight-access fastening
• 3/16 inch hex shank for positive retention in standard hex chucks
• Single-end configuration for straightforward bit holder compatibility
• Non-magnetic construction suited for precision electronic and mechanical assembly
• Non-insulated design for general mechanical fastening tasks

Compatibility

Designed as a direct-fit replacement insert bit for standard 4 mm drive, 3/16 inch hex bit holder systems used in hand tools and power drivers.

Installation Notes

Insert bits should be seated fully into the bit holder before applying torque to avoid slippage or cam-out damage to the fastener. Verify the hex chuck or bit holder is rated for the drive size before use. Replace worn or damaged bits promptly, as a compromised tip increases the risk of fastener and tool damage.