Wiha 71540 T40 Torx Insert Bit 1/4 Inch Drive 10-pack

Product Description

The WIHA 71540 is a T40 Torx insert bit designed for use with 1/4 inch hex drive power tools and manual bit holders. Built to the 25 mm (approximately 1 inch) overall length standard for insert bits, it fits securely in magnetic bit holders, quick-change chucks, and right-angle adapters commonly used in HVAC, electrical, and mechanical service work. The 6 mm hex shank mates with any standard 1/4 inch drive bit holder. This listing covers a package of 10 bits, making it practical for stocking a service van or shop bench.

The 71540 is suited for applications where T40 Torx fasteners appear on equipment panels, access covers, motor mounts, electrical enclosures, and light commercial or residential mechanical systems. The insert-bit format is intended for use in drills, impact-rated drivers (confirm compatibility with impact rating before use), and manual handles equipped with a 1/4 inch hex socket. Trade technicians in HVAC, electrical, and plumbing service will find the 10-count package useful for replacing worn bits across a crew or multiple service kits.

Key Features

• T40 Torx drive profile for T40 fastener heads
• 1/4 inch (6 mm) hex shank fits standard bit holders and quick-change chucks
• 25 mm (approximately 1 inch) overall length — standard insert-bit format
• Package quantity of 10 bits per order unit
• Compact insert-bit design compatible with magnetic holders and bit extensions

Compatibility

Designed as a standard 1/4 inch hex drive insert bit for use with any compatible bit holder, magnetic chuck, or driver accepting the 1/4 inch hex shank insert-bit format.

Installation Notes

Insert bits are installed and removed by hand from magnetic or spring-retention bit holders — no tools required for bit changes. Ensure the drive tool and holder are rated for the torque demands of the application before use. Inspect bits for wear or rounding before each use, and replace any bit showing deformation to avoid fastener damage.