1、Powerful Performance: You can grind many different hole sizes with this chamfering bit. With this chamfering bit, just one standard core bit will help you grind smoother holes of many different sizes. 2、60° Base Angle: Our chamfering bit has a base angle of 60 degrees. Its 80 grit as well as being practical and useful makes brazing a lot easier. 3、Sturdy and Practical: This chamfer bit is made of superb craftsmanship, sturdy and practical, and can be suitable for a long term under the correct operation. 4、Better Efficiency: The robust housing and powerful operation give this chamfer bit the ability to make the work process more efficienct and easier. 5、Application Scenario: This chamfering bit is suitable for shaping, enlarging and chamfering existing holes in ceramics, hard ceramics, granite and marble.