The Starlock multi-function 251 knife is the first knife for oscillating multi tools with three cutting surfaces. Because of the unique design of the blade (63903251280), material can be cut by pressing, pulling or pushing the blade for maximum versatility. The Starlock multi-function 251 knife is extremely flexible for a variety of applications and materials like carpet, PVC floors, cardboard, roof shingles and roofing fabric. Featuring the Starlock mounting system, the multi-function 251 knife fits every popular multi-function tool on the market. Even if you don’t own a FEIN oscillating multi-tool, you can affordably upgrade output by choosing a FEIN Starlock blade.