Allen wrench set, 10 pc. heavy duty, extra long 9" T-Handle, metric sizes. * Allen wrench set is heat treated extruded alloy steel, with black oxide finish for durability * T-handle design increases turning power and provides a sure comfortable grip. * All wrenches in the set are the same 9" length. * Allen wrench sizes: 2mm, 2.5mm, 3mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 8mm, and 10mm.