These are used to clear large properties in fact this one was used to clear under the Bonneville power lines I believe it is about 3,500 RPM comes with lots of extra brand new carbide teeth I had a guy come out and hook it up to my excavator and I believe he hooked the hoses up wrong and ruined the pump motor that will need to be replaced these are about 35,000 to 45,000 new I believe the pump will be about $2,000