Diamond Drill Bits: 22mm cutting diameter. Sintered diamond cutting edge contains diamond particles from inside to outside, to ensure that the edge is always sharp.. Application: Can be dry or wet drilling. To prolong the using life, it is recommended to be used with water for cooling and lubrication. Drill accurate holes on concrete, masonry, hard brick, marble, stone, marble, glass, tile and other hard materials.. Fit for Angle Grinder: Easily operate on the M10 Angle Grinder (not included here). Or need an adapter for drill or other machine, such as hex, round shank etc. (not included here). Cannot be used on impact power tools.. Features: Large clearance hole facilitates the entrance of cooling water and the escape of chips and other particles from drilling. Makes drilling process much easier.. Notices: When cutting holes, it needs to be positioned at an angle of 45 degree and make a crescent-shaped trace on the material. Then cut holes vertically and need to be cooled with water..
