4PCS Diamond Coated Hole Opener Hole Saw Cutter Drill Bit for Glass Tile 18mm

Features: *Function: drill hole on glass marble ceramic etc. *Application range: hand electric drill. *Made of high quality metal material very durable. *Opening neat smooth no broken edges will not produce tremor. *Can be used with a standard electric drill. *Water lubrication is required otherwise the diamond bit will be burnt. Specifications: Product Name: Hole Opener Material: Carbon steel Color: Silver Size: 18mm Suitable for: drill hole on glass marble ceramic etc. Quantity: 4pcs Package Includes: 4 × Hole Opener Notes: 1.Transition: 1cm=10mm=0.39inch. 2. 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. 3. Please allow slight manual measurement deviation for the data.