Newborn 375-XSP Super Smooth Rod Revolving Frame Caulking Gun, 1/10 Gallon Cartridge, 26:1 Thrust Ratio Steel revolving frame caulking gun for 1/10-gal. cartridges Thrust ratio of 26:1 for use with very high viscosity materials Revolving frame allows cartridge to rotate for maintaining bead orientation when caulking around corners Smooth pressure rod requires less force and is quieter than a ratchet-style pressure rod Heat-treated pressure rod is longer lasting than standard pressure rods