Premium Quality: Our glass hole saw with positioning pilot drill is made of high-quality diamond, solid hardened steel body, and the surface is nickel-plated, which ensures high hardness, rust protection, corrosion protection, durable strength and durability. Precise Positioning Pilot Drill Design Each tile hole saw is equipped with a removable positioning pilot drill. The cutting head of the pilot drill bit is also equipped with a diamond coating, which makes it sharper and more durable and effectively fixes the hole position of the hole saw so that holes can be cut quickly. SizeCutting diameter: 110 mm, cutting depth: 35 mm, total length: 70 mm, triangular shank diameter: 10 mm. Sharp and clean holes These diamond drill bits with thicker diamond coating make the groove edge sharper and can cut precise holes at flat bottom without chips on smooth surfaces such as ceramic tiles, ceramics, glass, marble, granite, etc. Terrazzo. Cutting depth up to 30 mm Easy to use The operation is simple without the need for special guide tools. Use the tile hole saw installed with the positioning drill bit to position the hole, remove the positioning drill bit after positioning, and then cut the hole directly with the tile hole saw. Note: Please remember to add water or coolant during the cutting process to extend the life of the diamond hole saw. Feature: 1) High-quality materials: Made of high-quality diamond, solid hardened steel body, which ensures its high hardness and long-lasting performance. 2) Unique positioning pilot drill design: Designed with a removable positioning pilot drill, so this glass hole saw can easily open holes without the help of other special guide tools. 3) Wide application: Can be used For cutting holes on smooth surfaces such as ceramic tiles, ceramics, glass (except tempered glass), marble, granite, and terrazzo. Features: Material: Premium diamond + hardened steel body. Triangular shank diameter: 9.5 mm. Cutting depth: 35 mm. Package includes: 1 x Diamond Hole Saw. 1 x Positioning Pilot Drill. 1 x Adjustable Wrench. Note: Remember to add water or coolant during the cutting process to extend the life of the hole saw.