WHOLESALE 13-Piece Long Hex Key wrench Set. Heat treated chrome vanadium steel with black oxide finish. Chamfered ends for fast, precise insertion and reducing the chance for stripping the fastners. Sizes included: 1.27,1.5, 2, 2.5, 3, 3.5, 4, 4.5 ,5, 5.5, 6, 8, 10 mmIllinois Industrial Tool Professional series tools