This product is a pair of T9 Torx (star) screwdriver bits with a 1/4" (6.35 mm) hex shank and a nominal length of 50 mm, designed for use in hand drivers and compatible power tool bit holders. The primary use case is fastening and removal of T9 Torx screws commonly found in electronics, small appliances and precision assemblies where a compact, accurate bit is required.

The bits are manufactured from S2 tool steel and are heat treated to provide a tough, wear-resistant tip; typical hardness is in the region of 58 HRC to ensure a durable edge life. The finish is a black phosphate coating to give improved corrosion resistance and reduced surface friction during insertion and withdrawal. The hex shank conforms to DIN 3126 / ISO 1173 dimensions for 1/4" bits, while the Torx profile is produced to the ISO 10664 star specification to ensure correct fit and reduced cam‑out. Thread type is not applicable to this product.

These 50 mm T9 bits are used extensively in electronics repair, telecoms equipment assembly, laptop and smartphone servicing, precision instrument manufacturing and light automotive or bicycle applications where small Torx fasteners are employed. The 1/4" hex drive makes them compatible with standard bit holders, quick‑change chucks, magnetic bit sockets and most cordless drivers, giving fast changeover between tasks.

Key benefits include a precision‑machined Torx tip for consistent engagement with screw heads, S2 steel construction for strength and tip retention, and a protective phosphate finish that helps resist corrosion compared with untreated steel. The 1/4" hex shank ensures broad compatibility across hand and powered bit systems, while the 50 mm length gives enough reach for recessed screws without excessive bend.

Duchy Fasteners stocks a wide range of Torx bits and lengths, available in single, twin and multipack configurations. Sizes from T6 up to larger Torx designations and a variety of shank lengths are normally held in stock; this item is supplied as a 2‑pack for convenience. If you need different sizes or bulk quantities please contact Duchy Fasteners for availability.