Newborn Model 112D Heavy Duty Caulking Gun fits 1/10th gallon ( 10.1 oz. / 300 ml cartridges). Rigid Parallel Frame construction for durability. Drip-fee spring clip drive designed as an automatic stop flow mechanism. Powerful E-Z Thrust hex rod piston design provides smooth trouble-free performance. With spout cutter, seal puncture tool and ladder hook. Thrust ratio is 10:1. E-Z load open front cap and cartridge retainer spring. Includes "Caulk Buddy" finishing tool with caps.