Ramset 1506 Drive Pin, Steel, Zinc           Use with Ramset, hilti, Remington and most powder actuated tools that use 22 cal single shots, 27 cal. 10 strips and 25 cal discs. For models of low velocity powder actuated tools with 300 or larger barrel diameter. Knurled shank pins for fastening to structural steel. Diameter of 0.145 in