POWERTEC 128320 12-Inch HSS Planer Knives for Makita 2012 and 2012NB, Set of 2 Replacement blades for Makita 12-Inch blades 793346-8 for model 2012 and 2012NB Made of High Speed Steel for longer cutting life Reversible knives have 2 cutting edges A set of two Specially designed for fast and smooth planing