A pipe vice is a plumbing tool designed to securely hold pipes or tubing so that they can be cut or threaded. Pipe vices are also useful for pipe welding. In industrial environments, a pipe vice is a critical tool in the assembly of pipeline components.A vise (in American English) or vice (in other English-speaking countries) is a mechanical device used to hold an object in place so that work can be performed on it. Vises consist of two parallel jaws, one fixed and the other movable, which can be adjusted in and out using a screw and lever.