JET Planishing Hammer has a quick change set up on the upper dies and a deep throat that works to the middle of most panels. The head with 3-speed regulator is capable of 4,400 4,800 / 3,200 3,500 / 1,800 2,000 blows-per minute (BPM). Easy to-reach, adjustable flow control valve allows the user to deliver the proper BPM needed for any job. Operates on standard shop air.