This product is a 10mm hex drive bit, 75mm long, designed for use with M8 fasteners and compatible power/hand drivers. Its primary use is to provide a reliable hexagon drive for tightening and loosening M8 bolts and set screws in confined or recessed locations where a longer reach is required than a standard bit.

The bit is manufactured from S2 tool steel and is heat-treated for increased torsional strength and wear resistance. A black oxide finish provides a degree of corrosion protection and helps reduce light reflection. The tip is formed to a 10mm hexagon profile to match standard hex-headed fasteners and hex socket adapters; the shank is compatible with 1/4" (6.35mm) hex quick-change chucks and bit holders commonly used in industry. Where relevant, the geometry and dimensions meet established DIN/ISO recommendations for hexagon bits, and the material and heat treatment process align with typical BS tool-steel specifications for hand tool bits.

Typical applications include general workshop maintenance, assembly and repair work, automotive servicing, plant maintenance and furniture or metal fabrication where M8 fixings are common. The 75mm length gives extra reach for recessed bolt heads, through panels or when working with spacers and collars, while the 10mm tip provides a secure drive that reduces rounding or cam-out when used with the correct socket or driver.

Key benefits of this bit are its enhanced torsional strength from S2 tool steel, the protective black oxide finish for improved corrosion resistance compared with plain steel, and broad compatibility with standard 1/4" hex tool holders and M8 fasteners. The longer length improves access without sacrificing control, and the precision-machined hex tip helps extend the life of both the bit and the fastener head.

Duchy Fasteners stocks these bits in a range of lengths and pack quantities to suit trade and DIY users; please check our range for single bits, multi-packs or compatible bit sets and holders. Product reference: DR33336.