Ramset, .27 Caliber, Cobra Semi-Automatic Fastener Tool.
From the Manufacturer
Ramset Powder Fastening Systems COBIII Cobra .27 Caliber Strip Tool with 2-1/2-inch Pin Capacity ( 3-inch with washer) is a semi-automatic tool for general construction and remodeling jobs, such as attaching 2 x 4's, furring strips, and electrical boxes to concrete and steel. It incorporates a padded recoil-absorbing handle for smooth operation and fastens up to 3 inch drive pins with washer. Ideal for professional remodeling projects, such as attaching wood to concrete or steel. One strip of loads drives ten pins, allowing greater efficiency and less reloads. The Cobra has all metal housing for durability. Specifications: Uses .27 caliber 10-shot strip loads 2 (Brown), 3 (Green), 4 (Yellow), 5 (Red), Weight: 4.5 pounds, Length: 13-1/4-inch, Muzzle Bushing O.D.: 9/16-inch, Maximum Pin Length: 2-1/2-inch (3-inch with washer).