Features:

1. With foot control. It is easy for operation and relax hands for adjusting the material.

2. Compression spring for top counter balance.

3.  Cam lock and rebound spring for bending beam counter balance.

4. Bow handle for bending beam rotation.

5. Adjustable bending angle stop with scale up to 135 degrees.

6. Segmented top beam tools.

7. Have the function of air spring which can be installed inside the arm (optional)