The ball-shaped end acts as a perfect stop for small slip rings or to lock large pellet wagglers in place. Two or three Grippa Stops next to each other provide adjustable stops for link legers, light bomb sinkers and small feeders.

The direction of the stop on the main line can also be reversed by transferring it from the thread to a nylon loop and then on to the reel line. They are made of a durable yet soft material that does not damage the line.