Features:*100% brand new and high quality*Made of high quality material, durable and practical to use*Diamond drilling saw, high quality diamond cutter*It can be used simply by installing it on a normal hand drill. When drilling, it needs to add coolant. When drilling, use force to play, especially when starting and finishing drilling.*Small incision resistance, increase the opening speed*The opening is neat, smooth without broken edges*Easy to decorate after slotting, easy to chip, no deformation, good stability*Suitable for drilling hard and brittle materials such as glass, plastic sheets, wood, etc.Specifications:*Material:Diamond *Color:Silver(As pictures show)*Outside diameter: 10mm(Approx.)*Quantily:10pcsTips:Please add water for coolant and drill slowly.Start drill at 45 Degree to surface and align to 90 Degree as hole forms.Never use drills while machine is in hammer action.Holes Require No Futher Work As Cutting Is Clean.Package Contents:10*Diamond Coated Hole Saw Drill BitsNote:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.