Bosch Professional Straight Planer Blade with Tungsten Carbide, 35°The Carbide Reversible Planer Knife is suitable for most handheld power planers that mount 82 mm blades. The Carbide Reversible Planer Knife delivers clean planing results on all wooden materials. Its sharp blades are double edge ground, enabling the reversible use of either side. It is intended for a wide variety of planing applications such as fitting, sizing and chamfering as well as rebating in hardwood, softwood and wood composite materials.