A bar clamp is a tool used in woodworking and metalworking to hold pieces of material tightly together. It consists of a long metal or wooden bar with adjustable arms that can be tightened to secure the workpieces. This makes it easier to glue, assemble, or cut materials without them shifting. These clamps are especially useful for projects involving furniture making or cabinet construction, where precision is key. By applying even pressure, a bar clamp ensures that joints are tight and secure, helping to create strong and durable connections in your projects.