Reduced Shank Drills. HSS Blacksmith Drills -. Material: HSS(HSS4241)(High Speed Steel ). Shank Type :Round Shank. 10mm Shank : 12mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm, 16mm. 12.7mm (1/2") Shank : 16.5mm to 35mm.
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