The 10mm sealey ratchet combination spanner is arguably the most essential size in any toolkit, as 10mm fasteners are ubiquitous across automotive, mechanical, and assembly applications. This workhorse spanner combines robust construction with refined engineering for daily professional use. Featuring the advanced walldrive® 72 tooth ratchet ring, this spanner requires only 5° of rotation to engage the next tooth, making it invaluable for engine bays, machinery housings, and other restricted access situations. The chrome vanadium steel construction ensures this frequently used tool will withstand years of demanding service. Features and benefits bull 10mm size the most commonly used spanner size bull 72 tooth ratchet with just 5° engagement requirement bull walldrive® ratchet ring for superior torque transfer bull chrome vanadium steel durability bull lifetime guarantee specifications brand premier length 165mm nett weight 0.08kg set model nos ak63907 7pc set includes 8 19mm, ak63912 16pc set includes 8 19mm, three square drive adaptors and one bit holder size 10mm