Patent ID: 8715041

Claim:
A sharpening tool, comprising: a main base, one end of which having an attachment device and the other end of which having a mounting seat, the mounting seat having a first receiving recess and a second receiving recess, and two first grinding blades intersecting each other disposed in the first receiving recess of the mounting seat; a grinding unit disposed in the second receiving recess, including a second grinding blade, a limit piece and a catch plate, wherein the second grinding blade is restricted and secured at the second receiving recess by the limit piece, the grinding surface of the second grinding blade protrudes out from the second receiving recess, and the catch plate, which has an abutting portion extending toward the grinding surface, covers the second receiving recess, and a cover mounted on the mounting seat of the main base to secure the grinding unit and the first grinding blades, the first grinding blades protruding out from an exposing slot of the cover, wherein the grinding surface of the second grinding blade and the abutting portion of the catch plate are arranged at an oblique opening of the mounting seat to increase efficiency of the sharpening tool.