Multi-purpose drill bits are made of Cobalt and Tungsten Carbide Tip, Chrome Vanadium Steel Shank, Application: Cast Iron, Harden Steel, Ceramic Tile, Marble, Concrete, Granite, Glass, Flexiglass, Fiberglass, Laminates, Wood
Packed in metal boxes, 13pcs: 1/8"~1/2" by 1/32" increments, 3pcs: 9/16", 5/8", 3/4"
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