https://shdiatool.com/collections/dia... Application: Drilling Holes+Enlarging&Milling Holes,suitable for porcelain tile, granite, marble, stone etc; Features: 1. 【Multi-function】Not only can drill holes, but also complete the work of chamfering,milling,grinding and enlarging holes; 2. 【High Quality Raw Materials】Premium steel body and premium diamonds create a premium product; Work more efficiently 3. 【Lightning Tooth Design】The design of the lightning teeth is conducive to the discharge of sundries and heat, better performance; 4. 【Good Working Finish Effect】Drill #35 / 40, fast and stable drilling, less chips, continuous cutting edge, less material loss; Chamfer #80, smooth and round; 5. 【Dry And Wet Use】Dry drilling and wet drilling can be performed to meet the needs of different scenarios.