T1-HSS 18% Tungsten Planer Knife Set of 4 fits   (always double check your original blades before ordering)

Smooth Back, Bevel Edge - 20-1/2" (520mm) Length x 1-3/8" (35mm) Width x 1/8" (3mm)Thick - Set of 4 Knives. Fits certain delta's like the RC-51 , 22-640 & phinero

Made in Germany

Highest Quality