Key attributes to evaluate when considering caulk guns include thrust ratio, size/tube capacity, and what it's to be used for. Newborn Caulk Gun, Drip-Free include characteristics like: Color: Silver, Size: 10 oz., For Use With: Caulks, Sealants, Adhesives.FeaturesIncludes: Spout Cutter, Seal Puncture Tool, Ladder HookThrust Ratio: 10:1Size: 10 oz.For Use With: Caulks, Sealants, AdhesivesConstruction: SteelItem: Caulk Gun, Drip-FreeType: Hex Rod, Comfort GripColor: Silver.