Simpson Strong-Tie Yellow 0.22-Caliber Single-Shot A Crimp, LVL 4, 100 Shot is designed for use with PT-22A, PT-22HA tools, and other popular low-velocity, single-shot powder-actuated tools. These yellow .22-caliber single-shot loads come in packs of 100 and deliver level 4 power, making them i for more demanding fastening tasks in concrete, masonry, and steel. They provide a higher velocity impact d to lower level loads, ensuring deeper penetration and strong holding power for a variety of construction projects. Model Number: P22AC4A