Planishing Hammer, Sheet Metal Capacity Aluminum 16 ga, Sheet Metal Capacity Stainless Steel 22 ga, Sheet Metal Capacity Steel 16 ga, Throat Depth 19 5/8 in, Hammer Mode Rigid, Speed Setting Variable Speed, Maximum Blows per Minute 1,350 bpm, Adjustable Depth Stop No, Anvil Die Type Flat, 6 in, 12 in, Hammer Die Type Flat, Air Inlet Size Hose, Air Inlet Type 1/4 in Male, Air Inlet Gender 1/4 in, Air Inlet Male