The facom 82hjp9a 9 piece hexagon key set metric includes the following short arm hexagon keys 15mm 2mm 25mm 3mm 4mm 5mm 6mm 8mm and 10mm the keys are ideal for driving bolts and screws that have hexagonal sockets they are made from silicon alloy providing strength and wear resistance the keys are precisely heat treated to ensure that if overloaded they will fail by twisting rather than breaking this guarantees user safety the set is supplied in a compact sleeve case with a hinged flap for insta