1. Hand hammer: it is used to knock a small area of convex or concave parts to make them smooth.

2. Hydraulic jack: it is used to flatten the convex or concave parts with large area, with high pressure and good stability.

3. Steel plate leveler: it is a professional steel plate processing equipment, which can trim large areas of convex or concave parts, and has the advantages of high efficiency and high precision.

4. Grinder: used to grind the surface of steel plate to make it smooth.