- Professional caulking gun suitable for 400 ml and 310 ml cartridges, as well as intermediate sizes - Sturdy powder-coated steel construction, designed for heavy-duty use and increased durability - Ideal for applying silicone sealants, putties, and adhesives, including high-viscosity materials - Molded finger trigger smoothly operates the plunger, providing a continuous flow and reducing hand fatigue - Release clip allows you to stop the flow when needed