Comments about MC ENTERPRISES Lockable D-Ring Extension:

These serve their intended function. But on one of my helmets you can actually pull these through the D-ring, so not particularly secure for that one but I hadn't needed these for that helmet. Otherwise a perfect cheap solution to helmet locking

Comments about MC ENTERPRISES Lockable D-Ring Extension:

Zen-like elegance in its simplicity and effectiveness. No extraneous buttons or electronics.So well designed and executed that it requires no instructions