This is a T30 x 75mm Torx (star) bit with a 10mm hex shank, designed for driving Torx-head fasteners in both powered and manual bit-holders. Its primary use is in assembly, maintenance and repair tasks where the T30 profile is specified — typical examples include automotive trim and bodywork, appliance servicing, joinery and general workshop work where a longer reach than a standard bit is required.

The bit is manufactured from S2 tool steel and is heat treated to provide the toughness and shear resistance required for repetitive wrenching. The surface is finished with a black oxide/phosphate-style coating to give improved corrosion resistance and reduced glare during use. The head type is Torx (TX) star and the drive size is T30; the shank is a 10mm hex, making the bit compatible with 10mm bit holders, socket adaptors and many commercial quick-change chucks. The geometry conforms to standard Torx profile dimensions and is compatible with ISO, DIN and BS Torx specifications, ensuring a secure fit with Torx fasteners and minimising cam-out and fastener damage.

Typical applications include automotive and motorcycle repair, commercial vehicle maintenance, appliance and HVAC servicing, furniture assembly where Torx fittings are used, and industrial equipment repair. The 75mm length gives extra reach for recessed or hard-to-access screws while the 10mm hex shank provides a positive drive connection for higher torque transfer than smaller shanks.

Key benefits of this bit are its material strength and durability from S2 tool steel, good corrosion resistance from the protective finish, and reliable compatibility with standard Torx fasteners. The accurate tip profile reduces wear on fastener heads and improves torque transmission, helping to prevent rounding and slippage during installation or removal.

Duchy Fasteners stocks Torx bits in a wide range of sizes and lengths, typically from T10 to T50 and lengths from 25mm to 150mm, available as single items or in multi-packs to suit trade and workshop requirements.