Low profile design for getting in between rafters and in tight spaces. Internal air filter prevents harmful contaminants from entering the engine. Tool-free selectable trigger allows for single-drive or multi-drive mode with the flip of a switch. Tool-free depth of drive adjustment design for precise sinking of fasteners. Adjustable rafter hook allows users to hang tool on rafters and joists. Last nail retention magnet helps prevent the last nail from dropping out of the nose of tool. Powerful enough to drive into engineered lumber. Power: 840 in/lb (inches per pound) at 100 psi (pounds per square inch). Nail length: 2" to 3-1/4".