Photo 1 of LIBRATON Four Spiral Flute Step Drill Bit, M35 Cobalt Unibit Step Drill Bit Set 1/8"-1/2", AlTiN Coated Step Bits, Four Spiral Flute, 1/4" Hex Shank for Metal, Stainless Steel, Aluminum, Plastic

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Photo 1 of LIBRATON Four Spiral Flute Step Drill Bit, M35 Cobalt Unibit Step Drill Bit Set 1/8"-1/2", AlTiN Coated Step Bits, Four Spiral Flute, 1/4" Hex Shank for Metal, Stainless Steel, Aluminum, PlasticPhoto 2 of LIBRATON Four Spiral Flute Step Drill Bit, M35 Cobalt Unibit Step Drill Bit Set 1/8"-1/2", AlTiN Coated Step Bits, Four Spiral Flute, 1/4" Hex Shank for Metal, Stainless Steel, Aluminum, Plastic