Find the retaining ring you need for your next project with Grainger. Here you\'ll find external retaining ring options to be used on the outside of shafts and internal retaining rings for the inside. Grainger also offers comprehensive retaining ring kits containing hundred of components so you\'ll always have the proper internal, external or E style retaining rings on hand when you need them most. To make the job even easier, consider a quality retaining ring applicator made of carbon steel.