Description: 【Application】:Desinged to enlarge, shape, grind and round bevel existing holes in Porcelain Tile Porcelain Granite Marble. 【Premium Material】: Diamond Chamfer Finger Bit is made of great quality emery material, which has high strength, high hardness, durability, and long service time. 【Unique Detail】 :Diamond chamfer has an extended thread interface, which is wear resistant, more convenient and enduring, and has an extended hole opening function. The bevel can reduce chamfering pressure, facilitate bevel enlargement, and polish existing holes. 【No Need to Add Water】: Diamond Cone Milling Bit has built in cooling , so no need to add water, it can be used directly, making hole opening more convenient. 【Matching Model】: Diamond Beveling Chamfer Milling Bit is often installed on a 100 type angle grinder or electric hand drill. Specification: Material :Emery Size Chart: Small:Diameter 3.8cm/1.50inch   Height 4.5cm/1.77inch   Aperture 0.9cm/0.35inch                       Large:Diameter 5cm/1.97inch     Height 5.5cm/2.17inch   Aperture 0.9cm/0.35inch   Package Includes: 1 Large Chamfer Bit 1 Small Chamfer Bit Note: Please allow slightly errors 1-2cm differences due to manual measurement.