For high volume, repetitive fastenings to concrete and steel Comes with 1000 pins and a fuel cell Shank diameter = .109 Head diameter = .250 Engineered for Ramset gas power tools 1/2-inch pin length

From the Manufacturer Ramset Powder Fastening Systems FPP012 1/2-inch Steel Pin with fuel cell is a fastener magazine that is specifically engineered for optimal performance in Ramset Gas Power Tools. The TrakFast fuel/pin is used for high volume, repetitive fastenings to concrete and steel such as drywall track to concrete. It comes 1000 pins and 1 fuel cell per box. Specifications: 1/2-inch Plated steel pin; Pin Length: 1/2-inch; 12.7 MM Shank diameter = .109 Head diameter = .250.