This product is a 2.0 mm internal hex (Allen) screwdriver bit with a 1/4" (6.35 mm) hex drive shank and a 25 mm working length, supplied as a twin pack. It is designed for driving small internal hex fasteners in confined spaces and for use with standard 1/4" bit holders, T‑handles, hand drivers and powered screwdrivers that accept interchangeable bits.

The bit is manufactured from S2 tool steel, heat treated to provide a tip hardness typically in the HRC 58–62 range for good wear resistance and torsional strength. The 1/4" hex shank conforms to DIN 3126 / ISO 1173 dimensions for bit interchangeability, ensuring reliable fitment in quick‑change chucks and magnetic bitholders. The tip geometry is machined for accurate engagement with 2.0 mm internal hex sockets, minimising cam‑out and damage to screw heads. The surface is finished with a black phosphate coating to give basic corrosion resistance and improved lubrication during use.

Typical applications for a 2.0 mm hex bit include electronics assembly and repair, instrumentation, small appliance maintenance, hobby and model making, telecommunications equipment and precision engineering tasks. It is well suited to trades and industries that handle small fasteners, such as electronic technicians, watch and instrument repairers, cycle mechanics for certain adjusters and any assembly line work requiring compact hex drivers.

Key benefits include the S2 tool steel strength for repeated use without shank deformation, tip hardness that resists rounding of small socket heads, and compatibility with the ubiquitous 1/4" hex system for easy interchange between hand and powered tools. The phosphate finish reduces the risk of corrosion in general workshop environments. As these bits are compact and accurate, they help protect delicate components by reducing slip and over‑torque issues compared with improvised tools.

This twin pack corresponds to Draper Tools part DR10391 and is supplied by Duchy Fasteners. We keep a broad range of hex bit sizes and lengths in stock, available in single items and multi‑packs to suit professional and DIY requirements.