Long life maintenance-free motor to keep from staining the work surface * Internal piston catch for consistent max power on every shot * Rear exhaust to keep contaminants away from work * Drives 18 ga. nails from 5/8-inch to 2-inch length; Tool-free depth-of-drive adjustment with detents for proper setting of nail heads * Measures 9-3/4by10.4 inches; weighs 2.6 pounds