Automatically deburr holes as you drill;High speed steel,durable.;Titanium coated to reduce friction and run cooler;Scop : thin iron plate,aluminum,insulation panels,PVC panels 4mm thickness within the timber.;Widely used to cut holes in a variety of material like steel, wood, thin iron, aluminum alloy, insulation boards, PVC sheet,ect

• Tourwin 10-45mm Golden Nitriding-HSS-Spira Nitriding Groove Core Hole Cutter Bit HSS Spiral Grooved Step Drill Bit

Tourwin 10-45mm Golden Nitriding-HSS-Spira Nitriding Groove Core Hole Cutter Bit HSS Spiral Grooved Step Drill BitTourwin