Super Duty Air Hammer, 3000 BPM, 2-9/32" Stroke. Make fast work of body panel crimping and cutting, bushing driving, shearing and general front end work with this air hammer, a super duty tool that produces up to 3000 blows per minute. Long Lasting: The 121 super duty air hammer was built with an alloyed steel barrel and heat-treated piston to make sure it lasts as long as you need it to. Super Duty: This hammer can produce up to 3,000 blows per minute so you can speed through your tasks with ease. Easy to maintain: Includes "easy out" throttle valve assembly. Built-in power regulator and trigger control.