The term 'workbench gripper' refers to two tools used in carpentry and other woodworking projects. The first tool is a CLAMP, which is a device used to hold two or more objects together firmly. The second tool is a VISE, which is a mechanical device used to hold an object firmly in place while it is being worked on. Both of these tools are essential for any woodworking project, as they provide the necessary grip and stability to ensure that the project is completed safely and accurately.