Has a handle grip and vent valve for purging air from gun. Two-way filing, suction and cartridge. Variable stroke / variable pressure: short stroke-high pressure; long stroke-high volume. Lube capacity: 16 oz. bulk / 14.5 oz cartridge. 21-3/4" in length This grease gun has a rugged cast pump head for strength and durability. Its exclusive "flip over" follower allows a superior seal for either cartridge or bulk loading applications. Tough, resilient and impervious to lubricant. The extra-heavy follower spring insures for positive priming and uninterrupted pumping action. This is a one-hand operation with similar of Lincoln lever-type grease guns.