The front part of the skid, left, application: 761107 Kuhn boron steel WARYŃSKI COOPERATING SCREWS: 2 x W-712121234 Working parts of the WARYŃSKI brand are made of extremely durable and abrasion-resistant boron steel from European steelworks. Each, even the smallest, delivery comes with a certificate confirming its material composition. Boron steel has properties that are particularly useful in structural applications requiring high strength. The combination of high-quality boron steel, monitored heat treatment process and meticulous quality control of WARYŃSKI products guarantees an extended service life. WARYŃSKI products save costs related to slow abrasion and wear of working parts. To ensure the durability of our products and customer satisfaction, the production process of WARYŃSKI blades does not involve welding. All types of holes are made in a special way to minimize stress and reduce the risk of cracks.