About this item COMPATIBILITY: For use with the Makita 2012 and 2012NB Thickness Planer Double-edged Disposable reversable W12 laminated high-speed steel construction blades stay sharper and last longer than conventional knife materials Blade material: HSS(High Speed Steel) Hardness: HRC 65-68° Size and Packed: 306 x 8 x 2mm 2pcs in a Plastic box