Knife. lawn mower knife 89X46X4mm hole 20.5 use 2220-101A JF-Stoll WARYŃSKI (sold in pairs of 25) [WKR89X46X4]Waryński knives are primarily a very carefully selected type of steel, preceded by many field tests. A professional approach to the process of selecting steel for knives guarantees farmers continuous operation of machines, even in difficult conditions. Thanks to additional heat treatment in a carefully monitored process, the knives are characterized by increased durability and durability. They are characterized by high abrasion resistance and are not susceptible to cracking during a collision with a foreign body. Waryński knives guarantee high cutting accuracy for a long period of use.