The e2 hitch release assembly spring from Fastway Trailer Products is built to keep your round bar arms securely locked into the e2 hitch head, giving you reliable performance every time you tow. It’s a direct fit for all e2 round bar hitch head sizes—6K, 8K, and 10K—so there’s no guesswork involved. It’s a small but essential part that helps keep your towing system safe, simple, and working like it should.