【CUSTOM FORMULATED OIL】The package contains a bottle of professional cutting oil. Our glass cutting oil is customized and optimized for glass cutting. The strong lubrication ability will protect the cutting head very well. 【LUBRICATE THE CUTTER WHEEL】 Please put a few drops of cutting oil into the handle lubricate the wheel of the cutter head before cutting the glass. The cutter wheel is lubricated when the cutting oil flows out. Please don't pour a lot of cutting oil into the hollow handle, the cutting oil will leak and flow away, it is too wasteful. 【LARGER CUTTING RANGE】3 pieces of cutting heads with different sizes in our package, 2-6mm, 6-12mm and 12-20mm, Easy to change the cutting blade for cutting different glass thickness. 【WIDE APPLICATION】The glass cutter tool is suitable for different glass types, ideal tool for mosaic, tiles, mirror, windows,stained glass cutting and household cutting work. 【Recommend】We strongly recommend that you practice several times on the discarded glass, you will find that you can cut better. In addition, we have updated the instructions , you will see the specific operation steps on the back of the product. Our products are suitable for straight cutting, cutting curved or circles will become difficult to operate., Manufacturer: HaroKing