ALLOY STEEL MATERIAL: Gunpla drill bit set forged from premium quality ALLOY STEEL, glass drill bits allow smooth and precise drilling in ceramic tile, marble, mirrors, glass, aluminum, concrete and wood. The durable drill bit should be well lubricated for the best possible results. This is most often done by running water over the drilling surface DIMENSION: Designed with a 6mm sharp point, the multi-material drill bits have a 1 or 4 inch design that reduces breakage. Length: 70mm, shank: approx. 3 or 16 inch. Our spear head drills are very resistant, intended to last a very long time APPLICATION: Ideal for drilling ceramic tiles, glass, marble and mirrors. When drilling hard materials, please use water for lubrication, good cooling can extend the life of the drill bit. Forests glass are generally used with electric drills to create holes in all of these materials. TUNGSTEN CARBIDE TIP: The ceramic bit features a tungsten carbide tip for longer efficiency and life. During the drilling process, the coating rubs the glass, creating a perfect hole in the material to be drilled WHAT YOU GET: The package includes 10 pieces 6mm glass and tile drill bits and plastic storage box, easy to carry. The multi-construction glass pieces are smooth, straight and have an ideal texture The drill bits are made of high quality alloy steel and have well constructed heavy duty tungsten carbide tips. Our carbide tipped drills are generally used for unhardened glass, ceramics and tiles. They feature a small scoop-like tip made of extra hard tungsten carbide, which is extremely durable and able to withstand friction from drilling into glass. Drill bits are cutting tools used to remove material in order to create holes, almost always of circular section. Attach the drills to any compatible bit to create holes that will allow them to cut or puncture the most difficult part, usually by rotation. It is important to work safely and carefully while wearing gloves and goggles to make sure no shards of glass get in your way. Use liquid to lubricate the drilling process and keep the drill bit from overheating. Dimensions Each drill bit measures 70mm in total length, with an orange tungsten carbide top designed for easy puncturing. With a length of 15mm, the tungsten carbide tips of these drill bits will easily puncture material with minimal effort. The point is 6mm wide.