The TA551A/16-11 medium crown stapler weighs in at only 4.9-Pound, has a rapid fire trigger valve, easy jam clearance door, trigger lock lever, comfortable rubber grip and shoots 7/16-Inch crown staples 1-Inch to 2-Inch in length. TA551A/16-11 SuperStapler 16 Gauge Medium Crown Stapler - Lightweight-only 4.9lbs. Newly designed 3 tooth driver blade (US Patent Pending). Rapid fire trigger valve. Quick and easy jam clearing by new design front latch (US Patent Pending). Adjustable depth control. Maintenance free end cap filter (US Patent 5637125). New design click lever. Comfortable rubber grip. Durable aluminum frame and cylinder cap. Use for: Sheathing, Subflooring, Roof decking, Furniture frames, Pallets, Crate and box assembly, Vinyl Siding. MODEL TA551A/16-11. WEIGHT 4.9 lbs. DIMENSIONS 11-3/8"(H) x 3-1/4"(W) x 14"(L). LOAD CAPACITY 157 staples. OPERATING PRESSURE 70-100p.s.i. (Regulator). AIR CONSUMPTION 0.039ft3/cycle (90p.s.i. operating pressure). Use with: Drives from 1" to 2", 16 Ga. medium crown (7/16") staples.