Rainbow Prism Day Collar - Stainless SteelThis ring of O day collar combines all black metal with an ultra colorful Swarovski crystal prism pendant as a bold centerpiece. This dainty day collar looks like a simple and stunning necklace, it's ultra discreet and minimalist design makes it ideal for everyday wear. Clasp Options Customize the clasp of this day collar by choosing from the following options: lobster clasp or a working padlock with 2 keys or no lock (if you already have a lock)