Spear pointed design strong tungsten carbide tip can easily penetrate various material(tile,concrete,brick,glass,plastic and wood,etc)and reduces breakout.Strong hardness and wear-,can be installed in hand drill,electric drill.xProfessional,sharp and durable.Improve 50% times than other drills.High-speed spiral can be effective in disposing of waste and can improve work efficiency.Color:goldmaterial:metalPackage Contents:5 * Hole opener(blade size 5*97mm 6*100mm 8*110mm 10*120mm 12*120mm each 1)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.