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Step Drill Bit Set for Metal, 1/4inch High Speed Steel Titanium Coated Metric Straight Groove Step Drill Bits Set with Automatic Spring Loaded Center Punch Power Tools : Industrial & Scientific

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Step Drill Bits - Metalworking & Multipurpose Drill Bits: Industrial & Scientific

SILATU Step Drill Bit - 1/4” to 1-3/8” Step Drill Bits for Metal, High Speed Steel Black Coated Stepping Bit, Unibit Ten-Flute Step Drill Bit Sizes for Wood, Metal, Plastic, Multiple

ZELCAN 10 Sizes Titanium Step Drill Bit, 1/4 to 1-3/8 Inches High

Step Drill Bits - Drill Bits - The Home Depot