Screwdriver Bit Torx T40 10 mm, King Tony KY163640T, 36 mm length

King Tony KY163640T is a Torx T40 screwdriver bit with a 10 mm hex shank and a 36 mm overall length. It is made for use with 10 mm (3/8") hex-compatible bit holders, ratchets and power drivers and provides a precise fit for Torx fasteners commonly found in automotive, mechanical and assembly applications.

Advantages

The precision-machined Torx tip ensures secure engagement with T40 fasteners, reducing cam-out and wear. The 10 mm hex shank allows quick insertion into standard bit holders and ratchet adapters, while the compact 36 mm length offers access in moderately confined spaces. The bit is compatible with hand and powered drivers, providing versatility across repair and assembly tasks.

Suitable for

• Automotive repair and maintenance involving Torx T40 fasteners
• Mechanical assembly and disassembly where secure Torx engagement is required
• General workshop tasks with bit holder or ratchet systems accepting 10 mm hex bits
• Light to medium-duty power driver applications

Key specifications

• Tip type: Torx T40
• Shank type: 10 mm hex
• Overall length: 36 mm
• Compatibility: bit holders, ratchets and power drivers that accept 10 mm (3/8") hex bits
• Typical uses: automotive, mechanical and assembly tasks

How to use

Select a compatible bit holder or adapter that accepts a 10 mm hex shank and insert the bit until it seats securely. Use with an appropriate driver—manual ratchet, bit holder, or power driver—applying steady, controlled torque to avoid over-tightening. For removal, reverse the driver direction and maintain axial pressure to keep the bit engaged with the fastener head.

Usage recommendations

Use the bit with the correct T40 fastener size and avoid excessive torque that exceeds the fastener or bit rating. Inspect the tip for wear before use and replace the bit if rounded or damaged to maintain secure engagement and prevent fastener damage.