This is a T20 Torx (star) screwdriver bit with a 30 mm working length and a 10 mm shank, designed for driving Torx-head fasteners in both hand and powered drivers. The bit’s primary use is to engage T20 Torx screws with a secure, six-point contact to reduce cam‑out and allow higher torque transfer than slotted or Phillips profiles, making it suitable for assembly, repair and maintenance tasks where repeatable, accurate torque application is required.

The bit is manufactured from S2 tool steel and has been heat treated and tempered to provide high wear resistance and toughness; typical hardness is in the high HRC range appropriate for impact and driver bits. The surface finish is a corrosion resistant black oxide/phosphate treatment to give improved protection against rust and to reduce surface galling in everyday workshop use. The drive type is a Torx (star) T20 head, with a cylindrical 30 mm long blade and a 10 mm cylindrical shank intended for use with bit holders and chucks that accept 10 mm shanks. The bit profile conforms to accepted industry dimensions for Torx drive profiles and is produced to meet common DIN/ISO/BS dimensional and tolerance standards for screwdriver bits to ensure interchangeability and correct fit with Torx screws and sockets.

Typical applications include automotive trim and small mechanical assemblies, appliance repair, electronics enclosures, furniture fitting and joinery assembly, plus general workshop and maintenance use. The T20 size is commonly used on medium‑sized fasteners found in transport, light engineering and domestic hardware. The geometry and material selection gives reliable engagement with reduced fastener damage and good resistance to tip rounding when used with the correct torque and tooling.

Key benefits of this bit are its S2 tool steel construction for strength and impact resistance, the protective finish for corrosion resistance in workshop environments, and the accurately formed Torx profile which improves torque transfer and compatibility with standard Torx fasteners. Duchy Fasteners stocks this Draper Tools Group D item (DR33350) in single pieces and multi‑packs; we also carry a range of Torx sizes and lengths to suit most workshop and site requirements. Please check shank compatibility with your bit holder or chuck before purchase.