Product description: Product name: drill bit set Material: Carbide Size: 5mm, 8mm, 10mm, 12mm. Package includes: 1/5/10 piece. Applicable materials: Dry-drillable materials: wood, plastic, aluminum, red brick, marble, glazed tiles, concrete Wet drilling materials: steel plate, aluminum plate, vitrified brick, granite, 201 stainless steel, 304 stainless steel How to prevent burning: Reason: The alloy itself has strong high temperature resistance. Drilling hard materials such as 201 stainless steel, 304 stainless steel, granite, marble, etc. will not reach the endurance limit in a short time, but the drill bit will burn out if it is used for a long time. Method: Adding water or cutting oil to cool the drill is an effective solution, and cooling without water will burn the drill. Households can use plastic bottle caps to drill small holes for watering. Instructions for use of ceramic wall stickers: 1. This drill bit can be installed on many types of machines such as ordinary hand drills, bench drills and rechargeable drills; 2. Only high-quality alloy is used, which has stronger hardness. It not only has the function of ordinary glass tile drill bits, but also has the function of electric drill bits. It can open holes in the cement bearing body, which solves the problem of ordinary drill bits that are easy to fall when encountering large stones. Non-destructive to the tile wall; 3. Water cooling must be added when drilling, and the strength should be light and very gentle, especially when the drilling is started and when it is about to be drilled, it should be slow and even; 4. After each use, please wipe clean the surface stains of the product, and apply anti-rust oil to prevent rust; 5. All kinds of hand tools must be installed according to the normal steps, and the tools are not allowed to be used if they are not installed.