Product Overview: What can you do with it: Ideal for drilling holes in both flat and contoured surfaces like glass or ceramic wall Diamond grit is a full 360-degrees around the circumference of the bit which allows it to be used in a rasping action to enlarge a hole if needed Holes on the side of the bit allow the removal of material Ideal for decorative projects including glass blocks or bottles How to use: When cutting a hole, ensure your work piece is well secured and do not apply excessive pressure to avoid cracking the glass Apply cooling liquid or water to the material Hold your tool at a 45 degree angle to go into the material Then gradually lift your tool up to make a 90 degree drill Apply drops of water / cooling liquid to the work piece for a clean drill operation You can take the accessory out of the material to apply water or cooling liquid Use with cordless tools only. Includes: