【High Quality Materials】The diamond hole saw is made of high carbon steel with a neat and clean opening without broken edges. Low incision resistance, stable drilling and no edge breakage. 【Good Design】Central guide holes and side holes help to remove waste easily; The diamond drill bit features gold colors to prevent rust and improve surface corrosion resistance. 【Wide Application】Diamond drill bits can be used for drilling ceramic tiles, marble, glass, granite, concrete and other hard materials. Works with all electric drills and impact drills. It is your ideal choice for DIY projects as well as home maintenance and repair. 【Please Note】When cutting hard materials, it is important to ensure that the cutter stays cool to avoid damage to the material being drilled and premature wear of the cutter. When drilling, water is needed for lubrication, which can extend the life of the drill bit. Features Material Stainless steel carbon Size 12mm diameter Package includes 1 x Diamond Hole Saw