"Push button adjustable depth guide sets nail to desired depths quickly and conveniently. Notched 16"" layout indicator on magazine helps achieve correct distance between studs in a matter of seconds. Lightweight magnesium design for added durability. Adjustable rafter hook allows users to hang tool on rafters and joists. Specs: Height 14-1/4""; Length 20""; Weight 7.6 lbs.; Driving Power 1050 Inch Lbs; Operating Pressure 80-120 PSI; Thread Fitting Type 1/4"" NPT. Fastener Specifications: Fastener Gauge .113 - .131; Fastener Range 2"" to 3 1/2"" 28 degree Wire Collated Stick Framing Nails; Magazine Capacity: 100 Nails"