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HSS6542 M2 Steel Spiral Groove Unibit HSS Step Drill Bits Set for Metal Stainless Steel Wood Step Cone Drill Hole Cutting Tool, Set of 3 : Industrial & Scientific
HSS Step Drill Bit 3/8 Hex Shank 7/8 To 1-3/8 Unibit Cone Drill Bit Metal Wood Dual-Fluted Stepper Bit Drilling Hole Tools - AliExpress
Set of 3 HSS6542 M2 Steel Spiral Groove Step Drill Bit Set for Stainless Steel Metal Wood Hole - China Step Drills, Spiral Grooved Drills
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A MULTI-PURPOSE - Stepped structure, Size Includes: Bit #1(13 steps): 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16,
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