【High quality material】 Made of high quality steel, high hardness, sharp and durable. 【Easy to use】 The hard edge allows for quick cuts and you can cut tough weeds and shrubs right where you need them. 【Professional design】Designed to quickly and easily cut through small trees, dense weeds and grasses. 【Good performance】Designed to operate up to 10,000 rpm. The chain teeth riveted to the blade can be sharpened with a 3/16 chainsaw file. 【Application】 Petrol mowers and brushcutters for 30 cc engines and above. 【Inner hole diameter】25.4mm