Ramset Powder Fastening Systems FPP034B 3/4-inch Black 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: 3/4-inch black pin; Pin Length: 3/4-inch; 19.1 MM Shank diameter = .109 Head diameter = .250.