Sweep gages consists of sweep body, contact, fork, swivel, indicator, and guard. Sweep body is made of steel and hardened to a Rockwell slightly harder than the bushing to reduce wear. The contact is the item that makes contact with the part being checked. The fork works in relationship to the contact. It is the transfer mechanism that carries the movement from the contact to the indicator unit at a 1:1 ratio. The swivel is attached the sweep body, and is the device which holds the indicator in place by use of a collet.