This 8pc Imperial Hexagon Key Set is a compact L‑shaped allen key kit intended for driving internal hexagon (Allen) fasteners in imperial sizes. It is primarily used for assembly, maintenance and adjustment tasks where hexagon socket screws are specified, offering reach and leverage from the long and short arms of each key.

The keys are manufactured from chrome‑vanadium (CrV) steel and are heat treated to give a high strength core suitable for workshop and site use. The finish is a black oxide/anti‑corrosion coating to reduce surface rust and glare while preserving the hardened cutting edges. The set is designed to engage internal hexagon (drive type: internal hex) sockets that conform to common DIN and ISO dimensions (for example DIN 912 / ISO 4762 hexagon socket head cap screws) and equivalent British Standard socket screw profiles.

The set contains eight imperial sizes to cover the most frequently encountered fasteners in older machinery, furniture fittings, bicycles and light engineering: 1/16", 5/64", 3/32", 1/8", 5/32", 3/16", 7/32" and 1/4". Each key provides the typical L‑shape head type with a short arm for high torque and a long arm for reach; the long arm is particularly useful for accessing recessed sockets. The tools are suitable for use on stainless, plated and black oxide socket screws when matched to the correct size and condition of the fastener.

Typical applications include machine tool maintenance, vehicle and motorcycle servicing where imperial fasteners remain in use, assembling antiquated or imported equipment, and general workshop repair. Key benefits are the CrV construction that gives good torsional strength and fatigue resistance, the protective black oxide finish for improved corrosion resistance, and accurate sizing to fit standard hex sockets which reduces the risk of rounding screw heads.

Part code DR33685. Duchy Fasteners stocks this Draper Tools Group D 8pc imperial set in single packs and bulk quantities; other imperial and metric sets are available across a wide range of sizes and pack formats to suit trade and DIY requirements.