Product details: Silicone-lined micro rings are fabricated with a aluminum metal. Interior of the ring is gentle on the hair with its protective, cushioned silicone lining, allowing you to install them flatter to the head for maximum comfort to the client, and allowing them to remain undetectable. It holds human hair very tightly after pinched and it will not easily get slide when wearing. There are two advantages for silicon rings: 1) No damage to human hair. It is because there is very soft silicone lined inside, so it is very safe to human hair even it is pinched very tightly. 2) No silding from human hair. How to Use: Step 1. Simply thread the micro ring onto the threading hook. Step 2. Take a strand of your own hair and slide the micro ring onto your own hair strand by hooking it into the threading hook. Then slide the micro ring onto your own hair. Step 3 Take the extension and slide the I-Tip bond into the ring from the bottom. Step 4 Clamp the ring shut with the closing / opening tool! Step 5 Do several rows on back of head and the sides of head. Step 6 Cut and style extensions. Finished! The extensions will last several months; depending on how fast your own hair grows. Eventually, the micro rings will have to be removed, or moved up towards the scalp again.