A caulking gun is a handheld tool used for the precise application of caulking or sealant materials. It consists of a metal or plastic frame with a trigger mechanism, a barrel or cartridge holder, and a plunger. The barrel holds a tube or cartridge of caulking material, which is loaded into the gun by cutting the tip of the cartridge and inserting it into the barrel. When the trigger is squeezed, the plunger is pushed forward, forcing the caulking material out through a nozzle or tip. Caulking guns are commonly used in construction, renovation, and DIY projects to seal gaps, cracks, and joints in various surfaces such as walls, windows, doors, and fixtures. They provide controlled dispensing of caulking materials, allowing for precise application and efficient sealing.