Package Include: 50 Pcs multicolor spring cord locks with box. Premium Material: The spring cord locks are made of high quality PP plastic, which is very durable and not easy to break, can last for a very long time. Easy to Use: Round toggle stoppers with spring loaded design, just simply squeeze together and the cord lock can move freely up and down. When released, tension is engaged and the cord lock will stay in place. Multipurpose Sliding Cord Fastener Locks: Widely used for shock cord, elastic cord, finer cords, pull cords, draw cords ,wet cords, shoelace, backpacks, sportswear, tents and other uses Firm Grip: With spring loaded design,can keep a firm grip on whatever the use is for, easy to install and use.