Eliminate excess shock cord and use of ranger bands Simplifies LightCap™ and ScopeCap™ installation Ease of manipulating light heads for battery changes and Vampire modes Better suited for scopes with rotating Oculars (EOTECH Vudu and NightForce Scopes) One of the biggest pieces of feedback we've received on our products is the difficulty of installation and battery changes when using our ScopeCap ™ and LightCap ™ products. By developing a locking ring with eyelets to fit the shock cord, we were able to completely eliminate the need for ranger bands and looping the shock cord around the light or optic body. Another pain point for some of our customers is how difficult removing a light head can be for battery changes or actuating the rotating head on Surefire Vampire Scout lights. Locking the shock cord to the light head itself, it allows a free range of motion and no more binding or unlooping of the shock cord. If you're using an LPVO where the magnification throw is a large part of the rear of the optic, the ShockCollar™ eliminates the binding when adjusting magnification. Is the ShockCollar™ required for the installation of our ScopeCap™ and LightCap™? Absolutely not. However, it does offer some major benefits.  Backed by our OHC-Risk-Free Guarantee™ If you buy a ShockCollar™ and aren’t completely happy with it, send it back for a full refund. No questions asked. We love our products and believe you will too.