Project Source 10-oz Anti-drip Ratchet Caulk GunErgo composite caulk gun provides good performance Rugged composite construction weighs up to 40 percent less than other models Ratchet style pressure rod has teeth to hold the rod in place after each pull of the trigger for minimizing drips Revolving frame allows cartridge to rotate for maintaining bead orientation when caulking around corners Spout cutter built into side for opening cartridges without a knife Hook on the back for hanging it on a