This product is a 10mm hex drive bit, 30mm overall length, intended for use with hex‑drive sockets, screwdrivers or impact drivers to install or remove hexagon fasteners. Its primary use is to transfer torque cleanly to 10mm hex heads and compatible socket screws in general maintenance, workshop and assembly tasks where a short, robust bit is required for access in confined spaces.

The bit is manufactured from S2 tool steel and has been heat treated and tempered for toughness and wear resistance (typical hardness range HRC 58–62). The working end is a true 10.00mm across‑flats hexagon, machined to close tolerance to ensure a positive fit in 10mm hex heads and reduce rounding of fasteners. The shank conforms to common 1/4" hex drive dimensions for quick‑change bit holders and chucks (see DIN/ISO shank specifications), and the bit surface is given a black phosphate finish to provide corrosion protection and improved lubricant retention during use.

Technically the bit is compatible with ISO metric coarse threads (for example M8 fastenings where a 10mm external hex is specified) and with standard hexagon head fasteners manufactured to DIN/ISO/BS dimensions. It is suitable for both manual and power tool use, provided the tool and fastener are rated for the applied torque. Typical standards relevant to the item include ISO 1173/DIN 3126 for hex shank tooling and common metric fastener standards such as ISO 4017 / ISO 4014 / BS 4190 for the mating bolts and nuts.

Typical applications include light engineering, automotive repair, furniture assembly and maintenance work in industrial and construction environments where a compact 30mm bit is useful for working in tight assemblies. Key benefits are the bit’s abrasion‑resistant S2 tool steel construction, the corrosion‑resistant phosphate finish, and precise 10mm hex profile which maximises torque transfer while minimising fastener damage. Compatibility with standard 1/4" quick‑change holders makes it easy to use with common screwdriver and drill drivers.

Duchy Fasteners holds this item as part of our Draper Tools Group D range (DR33329) and stocks a full range of hex bits and driver accessories in multiple sizes and pack quantities, including singles and multi‑packs to suit trade and workshop requirements. Contact us for current availability and pack options.