MIBRO 492470 Cobalt Metal Master Drill Bit Set, 1 6in. to 3 8in., 17 Pieces auspowers_batchthree preventing labels from cracking or 26 Thread length 11mm preventing labels from cracking or popping off or keep your electrical cords in place our mixed set of big and small clips will give you the right size the cobalt is blended into the high speed steel during the steel manufacturing process to give them their toughness From the Manufacturer This 17 Piece Cobalt Metal Master drill bit set from Mibro a 60 plus year old company selected as one of Canada's "50 Best Managed Companies" contains sizes from 1 6 Inch through 3 8 Inch in 1 6 Inch increments