1. The patented tool clamping system and large and small tools are unlimited. 2. The patented grindstone fixture system is compatible with grindstones of different sizes, lengths, widths and thicknesses, with and without bases. 3. The patented grinding stone compensation system can precisely set the grinding angle of the blade. 4. Patented large angle maintenance free silent smooth guidance system. 5. Patents conforming to ergonomics. 6. The metal material is more durable. 7. Four grindstones with different mesh numbers are provided for free: 120 mesh, 320 mesh, 600 mesh and 1500 mesh.