RYOBI introduces the 12.5 in. Thickness Planer Replacement Blades (2-Pack). Keep your RYOBI 21.5 in. Thickness Planer in tip-top shape with this set of replacement blades. The double-sided knives are made with precision-sharpened high-speed steel for super-smooth wood cuts, giving your woodworking pieces a finely honed edge. Easily change blades with the a magnetic blade wrench that is included with the 12.5-inch Thickness Planer (AP1305). Installation of replacement blades can be performed in just a few minutes to ensure the planer is running smoothly and on time.