Spear pointed design strong tungsten carbide tip can easily penetrate material(tile,concrete,brick,glass,plastic and wood,etc)and reduces breakout. Strong hardness and wear-resistance,can be installed in hand drill,electric drill. xProfessional, and .Improve 50% times than other drills.High-speed spiral can be effective in disposing of waste and can improve work efficiency. Color:gold material:metal Package 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.