Xcalibur Tooling Planer Blades are made from HSS 18% Tungsten and hardened to 61-63 HRc for greater durability when cutting soft or hard wood. Material: High-performance steel - HIGH SPEED STEEL Surface: Ground surface with 0.4 Ra finishing Xcalibur Tooling planer blades are supplied in plastic sleeves for protection in transit. Being one of the largest suppliers of planer blades, we have a wide range of planer blades to fit most of the make and models of JOINTERS (Surfacers) Planers & planer thicknessers around the world.