Pit Pro PT2440 Heavy Duty Extended Die Grinder 10.75 inches long Speeds up to 20000 RPM Works great in recessed areas 90 PSI air pressure Variable speed throttle Built for heavy-duty applications Works great in recessed areas Straight drive to provide highest possible RPM's at 20,000 Holds most 1/4 and No.34, shank wheels and bits Variable speed throttle