Pneumatic planishing hammer, whose pressure is 50-100PSI and maximum opening is 4 mm, can be combined with the standard anvils of 1 mm, 2 mm and 3 mm. 1. Anvil size: 1”,2”,3” radius 2. Speed: 875-1350 rpm 3. Anvil-to-hammer opening:4” 4. Operating air pressure 50 to 100 Max. PSI