The pneumatic corner folding machine for illuminated letters and the metal sheet corner folding machine can bend 30 degrees to 270 degrees, effectively bending 15cm Precautions This tool must be fixed on the countertop for use; otherwise, the force will be uneven and the effect will be poor 2. The material clamping method is pneumatic clamping plate, and the release of the clamping material is controlled by the foot pedal 3. Tools need to be maintained frequently, with lubricating oil added to ensure smooth operation and rust prevention