Specifications: Material: High Speed Steel Size: 6mm-60mm(12 levels: 6mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm) Shank diameter: approx. 13mm Package Included: 1Pc Hss Step Drill Bit.
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