This is a T40 x 75mm Torx (star) screwdriver bit with a 10mm shank, designed to drive T40 Torx fasteners in confined or recessed locations. Its primary use is to fit into a 10mm bit holder, socket adaptor or compatible chuck to install and remove Torx-headed screws and bolts where a longer reach than a standard bit is required.

The bit is manufactured from industrial S2 tool steel and heat treated to provide the tensile strength and edge retention required for frequent use. The working tip is machined to Torx geometry (TX) to engage the screw recess across the full contact surface and minimise cam‑out. The overall length is 75mm to give reach past panels and through spacers, while the 10mm hex shank offers a secure fit in 10mm hex chucks and holders. A black‑oxide finish gives basic corrosion resistance and reduces light surface rust; for harsher environments consider a corrosion‑protected or stainless alternative.

Dimensions and fit correspond with common DIN/ISO shank and bit tolerances (compatible with DIN 3126 / ISO 1173 style interchangeable shank holders) and conform to the dimensional norms for Torx drives used in industry. As this is a bit rather than a fastener there is no thread type to specify. The head type is Torx (star) and the drive designation is T40.

Typical applications include automotive trim and underbody work, mechanical assembly, furniture and cabinetry installation, HVAC and electrical enclosures where Torx fasteners are used for improved torque transfer. Torx drives are favoured in manufacturing and maintenance because they reduce stripping and allow higher torque than equivalent Phillips heads. Industries using this bit include automotive repair, light engineering, maintenance departments and professional joinery.

Key benefits are the precise Torx tip for secure engagement and reduced cam‑out, S2 tool steel strength for durability under repeated use, and a 10mm shank that improves compatibility with heavier duty bit‑holders and socket adaptors. For impact use check the manufacturer’s guidance; this bit is primarily for manual and powered drivers.

Duchy Fasteners stocks this Draper Tools Group D item (DR33361) in a range of sizes and pack quantities — single bits and multi‑packs — suitable for workshop and trade use. Contact us for specific size availability and bulk pack options.