Designed with slotting, the cutter head of the diamond drill bit features accurate cutting and fast chip removal, making your work a breeze. Following the sintering process, the diamond drill bit features high hardness and sharp edges compatible fast cutting. High-quality diamond material ensures the high hardness and long durability of the diamond drill bit. The length of the diamond hole saw is 73mm, and there are 5 specifications compatible you to choose from, their diameters are 12mm, 14mm, 16mm, 18mm, 20mm respectively. Diamond drill bit can be used to drill marble, glass, ceramic, tile, porcelain, granite, etc. Item Name: Diamond Hole Saw Material: Diamond Color: Blue Specifications: 12mm, 14mm, 16mm, 18mm, 20mm Features: Low Cut Resistance, Fast Opening Speed, Quick Chip Removal Size Details: 12mm Size: 73mm x 12mm//2.87" x 0.47" (Approx.) 14mm Size: 73mm x 14mm/2.87" x 0.55" (Approx.) 16mm Size: 73mm x 16mm/2.87" x 0.63" (Approx.) 18mm Size: 73mm x 18mm/2.87" x 0.71" (Approx.) 20mm Size: 73mm x 20mm/2.87" x 0.79" (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 Hole Saw