This D547 twist and lock GU24 replacement ring is for use with GU24 self-ballasted socket adapters like the SOCK-D3532. Made from a sturdy material and great for when the ring you currently own or owned has been damaged or lost. After all, it's cheaper to replace a single locking ring rather than purchasing an entirely new socket adapter. Or you could use it in an art project somehow. This one ring is yours to use as needed.