Key Drill - (10 & 13)mm

A chuck key sized to fit both 10mm and 13mm drill chucks - the two capacities almost every keyed drill on a Kenyan site uses. It is a tiny part with an outsized effect: a bit tightened by hand slips in the chuck under load, which chews the shank, ruins the bit and stops the hole being drilled straight. Tightening properly means engaging the key in each of the chuck's holes in turn, not just one. Chuck keys are lost constantly, which is why they are bought far more often than drills are, and why the sensible thing is to tie one to the drill's cable well away from the chuck itself. Check it engages your chuck before buying if your drill is an unusual size.