Spindle cappers, snap cappers, and spindle/snap combination cappers from Liquid Packaging Solutions all come with one set of gripper belts that stabilize the container and help to move the containers through the capping process. 

Some containers that are extremely tall, top heavy, or oddly shaped, may require additional gripper belts to stabilize them as the cap is threaded on to the container.  In these situations, LPS manufactures the cappers with a dual gripper belt assembly, simply adding another set of gripper belts to allow for the capping of unique containers!