Use for drilling in tough, high tensile strength materials. Cobalt coated bits last 12 times longer than standard bits. Sizes - 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4, 17/64, 9/32, 19/64, 5/16, 21/64, 11/32, 23/64, 3/8. Includes metal storage case. Additional Details SKU : 35357
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