Digital Craft 3Pc Titanium HSS Step Drill Set,13MM Drill Chuck,3Pc HSS Step Drill Set 4-12/4-20/4-32mm Hss Step Drill Bit Black Coated Cone Hole Cutter Metal Drill
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Features: 1. High speed steel material, more durable. 2. 1 step drill with a box. 3. High hardness, unique stepped structure, a drill can drill different size holes. 4. The central punch is not needed, small shaking, hard to be broken. 5. Working with water cooling, can effectively extend the service life of bit,drilling speed 250--400 recommended.Widely used to cut holes in a variety of material like thin steel board, wood, thin iron, aluminum alloy,insulation boards, PVC sheet, etc.
