The Grainger Approved Caulk Gun is a 10 oz. push-type caulk gun made of heavy-duty plated steel with a smooth rod and thrust ratio of 18:1. It features a fixed rod guide to prevent buckling, cushion grip handle to reduce hand fatigue, and built-in spout cutter for easy spout puncturing. This versatile caulk gun dispenses a variety of caulking, adhesive, and sealant cartridges up to 10 oz. It's designed for professional jobs and DIY projects.