What is the technical name for this tool that's used to hold pieces together during welding?

Locking pliers, which are usually known by the brand name Vise-Grip, allow the user to hold two objects together while also providing full use of both hands. Mechanics often use them during the welding process, which can't easily be done one-handed.

Asked by Don Ayres · Last updated 5 years ago · 421.3K views · SOURCE