Material:Made of durable hard PP plastic and features spring loaded design, and can be used to lock cord and make the cord firmly.Easy to install and use. Size:Round Cord Locks dimension: app.22x17mm/0.87 x 0.67inchHole diameter : app.8mm/0.31inch Multicolor:Package content 26 colors cord locks, PACKAGE INCLUDE: 30pcs (Color random) ball shape single hole elastic cord adjuster Easy to use:The toggle stoppers simply squeeze together and the cord lock can move freely up and down,when released, tension is engaged and the cord lock stays in place. FIRM GRIP WITH SPRING LOADED DESIGN: these cord locks use a thicker and stronger spring loaded, provide you with a very firm grip and guaranteed to keep your cord tight and secure WIDE APPLICATIONS: our cord locks end spring stopper adjuster are suitable for all kinds of drawstrings and different types of cords, such as shoelaces, backpack straps, trousers, such as hooded jackets, laundry bags, sportswear, tents etc.sliding cord fastener locks fit for many aspects, especially good for lanyard, luggage,shoelaces, backpacks, sportswear, tents,etc.