Dynamic Power Air Hammer With 4-Chisels is Ideal for muffler and pipe removal,body shop work, shock work,scraping rust,and light front-end work. Maximum comfort; anti-vibration feature reduces tool vibration by over 30 percentage when compared to standard air hammers in it class Alloyed steel barrel and heat-treated piston for long life. Maximum power: 15 percentage increase in impact force over standard air hammer product offering Built in regulator to match speed to the job. Maximum productivity: quick change retainer allows for faster chisel changeovers, so you can get the job done Adjustable air regulator and speed control. Four round chisels-include ripper,bolt cutter. Kit includes: air hammer, quick change retainer, 5 piece chisel set.