1/4 Gallon, Orange, Superior E-Z Thrust Caulker, Hex Smooth Rod, Parallel Frame Caulking Gun For Use With 29OZ Cartridges, E-Z Thrust Mechanism, Seal Puncture Tool, Spout Cutter & Ladder Hook, Uniframe Construction, Ideal for Professionals & Do-It-Yourselfers, Thrust Ratio 10:1.