Usage Tips:Package IncludesYou will receive 50 pieces eyeglass chain ends, including 25 pieces black and 25 piece white, and eyeglass chain end of every color has metal coils in golden and silver, sufficient quantity for you to use for a long time. High Quality Material: The glasses chain ends are made of stretchy silicone and sturdy metal, not easy to break down, durable and reusable. Adjustable: The eyeglass chain end measures approximately 2cm in total length and the metal coil is 8mm long, the metal coil can be moved to adjust the grip on their eyeglasses and fit for most eyeglasses' arms. Easy to Use: Just slide one side of silicone ring up the arm of glasses, and fasten the other side onto the chain or DIY decorative necklace. These spectacle chain connectors can prevent your eyeglasses from accidentally falling or losing. Wide Usage: Ideal for short-eye eyeglass, sunglasses and any handicrafts object that require glasses chain ends, the end loops are useful for hanging eyeglasses around the neck to present a stylish look.