16 piece set of mini hex keys made from chrome vanadium steel for strength and durability metric sizes from 07mm to 3mm afimperial sizes from 0028 inch to 964 inch afideal for router cutters modellers engineers automotive diy and electronics whats included7 x metric hex keys9 x imperial hex keys specifications size af07mm 09mm 13mm 15mm 2mm 25mm 3mm size af0028 0036 005 116 564 332 764 18 964