Steel half-barrel (also called cradle) frame caulking gun for 1/10-gal. cartridges. Thrust ratio of 6:1 for use with medium viscosity materials. Ratchet-style pressure rod has teeth to hold the rod in place after each pull of the trigger for minimizing drips. Rod retracts after each pull of the trigger to help prevent dripping. Welded plate in back for securing cartridge in place.