Ridgid AC8630 13-Inch Planer Blades comes with two planer knives per package. The precision sharpened, high sharpened steel edges provide long life and extremely smooth cuts. These knives are reversible with two cutting edges. Each knife is sharpened on both edges for two times the life of a single edge knife. Compatible With AP1301 Surface Planer, TP1300 13" Thickness Planer, TP13001 13" Thickness Planer, TP13002 13" Thickness Planer, TP13000 13" Thickness Planer..