Over 500 lbs. of push force to handle higher viscosity materials allow user to caulk with ease. Variable speed selector lets user adjust the discharge rate to control the bead of caulk P163 Includes: (1) P190 18-Volt ONE+ 2.0 Ah lithium-ion compact battery, (1) P118 dual chemistry charger and an operator’s manual Switch lock helps prevent accidental start-up. Center balanced handle for increased user comfort