KMC's Half Link chain is the most reliable in the industry the perfect chain for maximum adjustability and great looks. Half-Link chains are perfect if you're looking to run a single speed setup on a bike with vertical dropouts. Their adjustability makes them ideal for getting your wheels into the perfect position. Half-Link chains give you the ultimate level of adjustability allowing you to cut down the length of the chain by half a link each time which means you can get the perfect link without having to compromise. 1/2' X 1/8' - 100 Links pin length 9 5mm Compatible with: BMX / Freestyle Super Smooth and Adjustable Half Link Design Nickel Plated