Grizzly H5038 12 1 2" x 23 32" x 1 8" HSS Planer Knives for G0505, Set of 2 tumbletype_barrel Note: The full spectrum of Vertical Note: The full spectrum of ratings are not supported by the 3 ) 230 only Feed Rate (FPM) 24 31 & 16 20 Dust Collection Minimum CFM Required (CFM) 900 Number of Speeds 4 Knife Size (L x W x T) 20 x 1 x 1 8 Number of Knives 4 Bed Rollers Adjustable from Front N The H5038 12 1 2" x 23 32" x 1 8" HSS Planer Knives are a direct replacement for your dull or nicked knives HSS stands for high speed steel where the steel has undergone a metallurgic process to withstand higher temperatures without losing hardness