Wow! Turmfalke saws and knives high quality planer Kity PT 8500 planer blades 210 x 22 x 1.8 mm 2 pieces (1 set) made of hard chrome 52 Rockwell (material ThyssenKrupp) size: 210 x 22 x 1.8 mm. 0 mm disposable For use on knife shafts suitable for various machines. Quality product made in Germany. - The planer blades are made in metric and inch dimensions. - The hardness of the planer blades is 52 HRc - the heat treatment takes place in an electronically controlled special hardening system. - The customer-specific production of planer blades of all dimensions.