Feature: It is suitable for cutting glass plate,the blade of cutter wheel is made by the mirror process of the special spark, so the cutting line is very beautiful. Sharp cutting,the cutter wheel is sharp, the blade is extended, the bold shaft will be unbroken under strong force. Non-slip handle. Frosted aluminum alloy handle is anti-skid, anti-scratch ,and has good wear resistance. The ergonomic handle,make it comfortable to grip,help you save labor .even if you use it for long time,you will not feel tired. Metal tap,the head is made of metal, which is used to knock and divided into blocks after cutting the glass. Specifications: Type: roller type glass cutter Suitable for: cutting glass plate Length: 170 mm/6.69inch Cutting thickness: 6 - 12 mm/0.23-0.47inch ColorOptional:yellow/blue/red/green/purple Directions : 1.Please Confirm glass thickness before selecting glass cutter 2.Wipe the glass surface to make it smooth and clean.Hairy glass and non-smooth glass isn't suitable. 3.Before using, it is best to inject kerosene, or other oil, into the handle tube, and make sure to overflow from the blade. 4.In the process of cutting glass, the blade of a glass cutter should be straighter and parallel to the straighter motion. 5.In the process of cutting glass, the downward pressure of the hand glass cutter is not too heavy or too light, maintain 20N is ok. 6.When cutting a glass curve, it is necessary to make a good curve to cut the curved glass 7.In the process of cutting glass,when hearing crisp sound ,it is done.The line can't be repeated, or the blade will be damaged 8.In the case of deactivate, it is recommended that the cutter wheel and the shaft of the shaft should be dripped in a small amount of oil to prevent rust ,and extended the service life of the wheel. Note: Glass cutter isn't suitable for toughened glass,vitrified brick, marble, quartz such as hardness objects.It can't used on the glass not flat, can not directly in the Windows, walls and facade on the operation. The operation should be flat on the ground or flat surface of the table. Package Included: 1 x Roller Glass Cutter