Compact design fits between 12" OC joists. Low nail lockout prevents dry fires. Exclusive safety system prevents misfires. Exposed nail tip design fires in the hole for faster, more precise nailing. Specs: Height 10-1/2"; Weight: 4.6 lbs.;Driving Power: 450 Inch Lbs. Magazine Capacity 29 Nails; Operating Pressure: 80-120 PSI; Thread Fitting Type: 1/4" NPT.Fastener Specifications: Drives 1-1/2" paper tape collated metal connector nails (.131" - .148" diameter).