Ryobi P310G 18v Pistol Grip Variable Discharge Rate Power Caulk and Adhesive Gun (Tool Only, Holds 10 Ounce Carriage) UP TO 500LBS OF PUSH FORCE allowing you to dispense a wide range of high viscosity sealants ENERGY EFFICIENT: dispense up to 200 tubes of caulk on a single Ryobi 18-volt battery BALANCED SYSTEM: weight is distributed evenly on top of the ergonomically designed pistol grip handle, making it easy for everyone of all ages to use with comfort VARIABLE SPEED ADJUSTER lets you dispense differently sized beads, so you can do any sealing job without changing your workflow ONBOARD PUNCTURE TOOL means you do not need to worry about carrying more tools on the jobsite than you have to