ITEM NAME:Deburring External Chamfer Tool Metal Remove Burr Tools for Chuck Drill Bit Kit Product Description Description: Features: Removing burrs does not hurt the hands and improve efficiency. Any thread can be ground. It is suitable for all kinds of chuck drill and meet different needs. Specifications: Material: CR12MOV Size: inner diameter 22mm/0.87", outer diameter 28mm/1.1" (specific size,reference picture) Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow slight measuring deviation due to manual measurement. Included: 1 x Chamfer.Included: 1 x Chamfer. Any thread can be ground. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item. Removing burrs does not hurt the hands and improve efficiency.