1The cutter is made of highstrength PC material, high permeability, not easy to break. 2The cutter has highquality stainless steel support rods, precise threads, and not easy to rust. 3The cutter wheel is made of highquality alloy material, which has high hardness and incisive cutting. 4The cut is incisive, so you can use this glass bottle cutter to make some interesting handicrafts 5If you have any problems in use, please contact us in time for processing,and we are happy to serve you. Item Type: Glass Cutter Material: PC Bracket Material: Stainless Steel Cutting Diameter: Approx.20-230mm or 0.8-9.1in Product Use: Cutting Round Bottles 3 x Acrylic Plate 2 x Lead Screws 10 x Nuts 2 x Plastic Pipes 1 x Screwdriver 1 x Abrasive Paper 1 x User Manual It must be ensured that the bottle is empty and in an open state. It is forbidden to plug the bottle or cork.The mouth of the bottle that has just been cut is very sharp, so you can use sandpaper to sand the edge to prevent injury to your hands. If you fail to cut and open the bottle, please repeat the second and third steps.