The Dripless C150 Consumer Grade Smooth Round Rod Cradle Frame caulking gun has a steel half-barrel frame that fits 10 oz. cartridges and has a 5:1 thrust ratio for use with latex, vinyl, and acrylic. The smooth pressure rod requires less force and is quieter than a ratchet-style pressure rod. The hook on the back allows it to hang on a ladder, and a seal puncture tool and a spout cutter are built into the side of the gun for opening cartridges without a knife.