D-sub tools and hardware are components used in various electronic assemblies. They are primarily used on computer hardware and connectors, such as serial and parallel ports. The “D” in D-sub stands for “D-shaped”, referring to the distinctive shape of the components. In most cases, a D-sub tool is used to screw, bolt, or otherwise attach a D-sub connector to a particular surface. Examples of D-sub tools include D-sub kits and D-sub crimpers. D-sub kits are necessary for making the connections between D-sub connectors and the matched mating connector or screw, and D-sub crimpers are used to ensure that the crimps are made correctly. When used properly, D-sub tools and hardware can connect any two electrical components and are essential for proper computer operation.