70 mm long spearhead 6mm cutting or tile marble glass drill bit tapper 4 pi B2J2

ITEM NAME:70 mm long spearhead 6mm cutting or tile marble glass drill bit tapper 4 pi B2J2 70 mm long spearhead 6mm cutting or tile marble glass drill bit tapper 4 pi B2J2 Spearhead car.Type: spearhead. Be used to drill glass, tile, porcelain, ceramics and other hard fragile materials without chipping or cracking of the material, if you used properly.