25 per box. .300 head diameter drive pins. Designed for use in concrete and structural steel applications. ITW Ramset powder actuated fasteners are specifically fabricated to meet the exacting requirements of toughness and durability. For use in Model No. RS22, 721, Autofast, D60, SA270, HD22, D45/D45A, Cobra, M70, Hilti, Remington tools, and ITW Model No. 00022 (SKU 300533), 40088 (SKU 300560), 08896, and 16941 (SKU 300597). Packaged in reusable plastic storage box.