Features:  --Easy to operate, easy to store and more aesthetically pleasing.  --Recycle glass bottles and jars and make a functional artwork.  ---Create your own glass sculptures, sun catchers and ornaments easily with this metal cutter.  --Eco-friendly material, exquisite design, is safe and durable.  --Suitable for most of drinkings glass bottles.  --Install the cutting head in a glass bottle or glass jar that can cut a diameter of 20-230mm.     Specification:  Name: Glass Bottle Cutter Kit;  Color: Clear/Red/Blue/Black/Replacement Kit;  Material: PC&stainless steel;  Cutting Diameter: 20mm-230mm;  Size：200 x 150mm/7.87 x 5.9in.     How to use it:  1: Adjust the glass bottle cutter to fit the size of the bottle -  You simply need to adjust the stand of the glass cutter to the length you want to cut by loosening the screw and put the bottle on it. Adjust the cutting wheels position so that it could keep touching and scribing the glass while using.  2: Daub the candle on the scratches (2 times is better).  3: Scoring the bottle -  Once the cutting wheel is at the proper location, start slowly turning the bottle. Rotate it until scratches appear.  4: Separation -  Pour the hot water and cold water alternately on the scratches (First pour the hot water, and then the cold water.  At the same time, keep turning hte bottle). Repeat it 2 to 3 times, the two parts will separate automatically. Thicker glass may take additional cycles.  5: Smoothing the edges -  Sand the edge down with polishing paper.     Package Includes:  Optional 1:  1 x Replacement Kit  Optional 2:  1 x Black Glass Bottle Cutter Kit (Included Sandpaper& User manual);  Optional 3:  1 x Clear Glass Bottle Cutter Kit (Included Sandpaper& User manual);  Optional 4:  1 x Blue Glass Bottle Cutter Kit (Included Sandpaper& User manual);  Optional 5:  1 x Red Glass Bottle Cutter Kit (Included Sandpaper& User manual).