Ramset 607 powder loads 721, m70, MasterShot, TriggerShot or HammerShot tool with the ramset 0.22 caliber yellow single-shot powder loads 100 count. These loads provide enough power to help penetrate concrete and hollow block. Use with ramset 721, m70, MasterShot, TriggerShot and HammerShot toolsHelp provide the power to penetrate hollow block and concreteYellow loadsComplete powder-burn prevents residue build-upPrecise powder weighing prevents under or over-packed shots