The Kreg Foreman 3/4-Horsepower Semi-Automatic Pneumatic Pocket Hole Machine features a pneumatic drill motor and an automatically adjusting air clamping cylinder. To operate, simply position your material to be drilled and pull the lever forward. This motion supplies air to the clamping cylinder that automatically adjusts to your material thickness as well as activates the 3/4-horsepower drill motor. Finish the drill stroke by continuing to pull on the lever and then return the lever to the home position to cut the air supply. The machine operates at 90-120 PSI , needs a minimum compressor capacity of 5.3 CFM at 90 PSI , and can accommodate a 1/2-inch-to-1-1/2-inch material capacity. This model features new improvements over the DB50 model that include the addition of an oiler, top catch release, and the fence can now be adjusted from the top instead of under the machine. The machine comes backed with a 30-day manufacturer's limited warranty.