We have Sioux Tools CH43A-R 3stroke Rnd Bushing 4bolt Air Chipping Hammer with Product Detail Package Quantity: (1) Unit Type: Four Bolt Chipping Hammer Stroke Length (Inch): 3 Blows Per Minute: 1650 Shank Size: 0.680 Round . The "Sioux Tools CH43A-R 3stroke Rnd Bushing 4bolt Air Chipping Hammer" is best product for you. We recommended Sioux Tools CH43A-R 3stroke Rnd Bushing 4bolt Air Chipping Hammer