About this item: Diamond Drill Bit Set Sizes - Set include 10 holes saw drill bits+1 hole saw guide clamp+1 screwdriver driver + 4 triangle bit. 10 Sizes Diamond hole saw : 6mm, 8mm, 10mm, 12mm, 20mm, 25mm, 30mm, 35mm, 40mm, 50mm,made of high-strength carbon steel, the integrated steel structure makes these diamond drill bits more durable. Diameter of triangle bit: 6mm, 8mm, 10mm, 12mm. Rustless & Durable: This diamond drill bits are made of high strength Carbon Steel with smooth nickel plating surface. Each diamond hole saw was coated with high quality Diamond to enhance the drilling speed and creates a sharp, high precision and smooth cut with no broken edges In Seconds. Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably. Adjustable Fixture - Adjustable hole saw drilling guide fixture with suction cup-the maximum opening length of the board is 3-1 / 4 inch, which is enough to fit in all size hole saws. Movable , two modes (fixing 3 or 4 bearings) are , just flip the board. The clearance holes along the drill bit help the entry of cooling water and the escape of chips and other particles from the borehole, ensuring smooth punching and making the drilling process easier. Small holes-When debris gets stuck in the hole saw. use our screwdriver to pull it out. To provide you with the perfect experience. Wide Usage - This diamond-coated hole saw bit can be used to remove rings on glass, marble, tile, ceramic, PVC or other materials. When the diamond bit is working, please continue to add water to reduce the drilling speed, reduce the drilling pressure, and increase the water lubricity, which will greatly extend the life of the bit. Color: Blue Material: alloy steel Package Contents: 1 x Hole Saw Guide Jig Fixture 10 x Diamond Coated Drill Bit 4 x Ceramic tile drill bits 1 x Screwdriver Only the above package content, other products are not included. Note: Light reflection 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.