This product is a 10 mm hex driver bit, 75 mm in length, intended for driving 10.0 mm across‑flats hex fasteners and internal hex sockets in workshop, maintenance and assembly applications. Its primary use is to give additional reach and a precise fit when accessing hex heads and socket screws in confined or recessed positions using hand drivers, quick‑change bit holders or powered screwdrivers.

The bit is manufactured from S2 tool steel that has been heat treated to provide high torsional strength and resistance to wear under repeated torque. The working tip is a 6‑point hexagon profile machined to a tight tolerance for secure engagement and reduced fastener rounding. The shank is the common 1/4 inch (6.35 mm) hex drive to fit standard bit holders, quick‑change chucks and driver adapters in accordance with ISO 1173 / DIN 3126 shank dimensions. A black phosphate finish provides basic corrosion resistance and helps resist surface corrosion in typical workshop environments.

Technically, the bit is suitable for use with metric fasteners and hex socket screws manufactured to ISO/DIN standards (for example ISO 4762 / DIN 912 for hexagon socket cap screws), and is sized to work with 10 mm hex heads or internal hex sockets commonly encountered on metric hardware (including many M10 applications). It is intended for hand and powered drivers at moderate torque levels rather than heavy‑duty impact use.

Typical industries and applications include automotive repair, mechanical engineering, plant maintenance, furniture assembly and general building trades where access and accuracy are required. The accurately formed hex profile reduces cam‑out and fastener damage, while the S2 construction and heat treatment deliver the strength needed for repetitive use.

Duchy Fasteners stocks this Draper Tools DR33337 10 mm hex bit in single pieces and multi‑packs, and carries a wider range of hex bit sizes and lengths to suit most workshop and on‑site requirements. If you need alternate sizes or lengths, please contact us for availability.