Features and Benefits:

Dual Drive bits are a unique stubby length fastener driver system that can be used with any 1/4" square drive socket spinner handle, ratchet or T-handle and drive the outer diameter with either 7/16" wrench or box wrench (12mm and 13mm tip driven on od by 1/2" or 13mm wrench). Bits made from S2 tool steel  with proprietary heat treat for superior strength and durabilty. Precision tip profile manufactured for positive and precise fastener engagement. Titanium nitride coating for added strength and wear resistance. HEX METRIC set includes 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 12mm and 13mm. Comes with color coded storage rail.