Slotting Designed on the cutter head of the diamond drill bit provides fast chip removal and maintains low temperature, improving your work efficiency. The diamond drill bit with sintering process has the characteristic of high hardness and sharp edges, which achieve fast and smooth cutting. Using premium diamond material, the diamond drill bit with exquisite workmanship is wear-resistant and durable. The length of the diamond hole saw is 73mm, and there are 5 specifications compatible you to choose from, their diameters are 25mm, 30mm, 35mm, 40mm, 50mm respectively. You can use the diamond drill bit compatible cutting marble, glass, ceramic, tile, porcelain, granite, and so on. Item Name: Diamond Drill Bit Material: Diamond Color: Blue Features: Sintering, Smooth Cutting, High Strength Specifications: 25mm, 30mm, 35mm, 40mm, 45mm, 50mm Size Details: 25mm Size: 73mm x 25mm/2.87" x 0.98" (Approx.) 30mm Size: 73mm x 30mm/2.87" x 1.18" (Approx.) 35mm Size: 73mm x 35mm/2.87" x 1.38" (Approx.) 40mm Size: 73mm x 40mm/2.87" x 1.57" (Approx.) 45mm Size: 73mm x 45mm/2.87" x 1.77" (Approx.) 50mm Size: 73mm x 50mm/2.87" x 1.97" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Diamond Drill Bit