Zero nail lockout feature eliminates dry firing and indicates when to reload the magazine. Nosepiece features carbide inserts for long-life performance. Aggressive wear guards and skid pads protect the tool from damage on abrasive surfaces. Patented, single-action, side load canister for fast, one-step nail loading. Adjustable shingle guide for quick shingle spacing. Specs: Load capacity: 120 nails; Drive Power: 410 in -lbs.;Power to Weight Ratio: 85; Tool Weight: 4.8 lb. Fastener Specifications: 3/4 in to1-3/4 in 15-degree wire-collated roofing nails.