Aluminum main housing and cap is more durable than magnesium for punishing roofing environments; Tool free adjustable depth of drive for consistent and controllable nail set; Comfort and convenience features include: durable molded comfort grip, 360 tool free adjustable exhaust, and adjustable shingle guide; Steel wear plate reduces shingle abrasion on tool; Adjustable nail canister accommodates entire range of true round head roofing nails; Tool includes case, tool oil, and wrench; 5 year warranty