This 10oz (310ml) capacity caulking gun has a dual Thrust system able to change from 12:1 to 24:1 thrust ratio with the flip of a switch. It has a 360-degree rotating barrel designed to increase comfort and decrease user fatigue. With 4 different integrated patented systems the OX Pro Dual Thrust Caulk Gun is designed to be comfortable, practical, and user-friendly. It is made from high quality metal and shock absorbing rubber at common impact points to ensure a dependable, long-lasting lifeand has rubber over molded grips that are easy on the hand and absorb harsh impacts.