Newborn 620-AL Sausage/Bulk/Cartridge Smooth Rod Caulking Gun, 10-20 oz. Sausage Packs/24 oz. Bulk, 18:1 Thrust Ratio Aluminum sausage, bulk, and cartridge caulking gun for 10 oz. or 20 oz. sausage packs, 24 oz. bulk caulk, or 8-1/2" or 10" cartridges Thrust ratio of 18:1 for use with medium to high viscosity materials Revolving frame allows barrel 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 Aluminum barrel with zinc alloy handle and trigger is lightweight and corrosion resistant