The Mini chain tool is a versatile design that works with all speeds of chain, excluding 12 speed and flattop chains Due to it's direct and discrete design you can work safer and with better accuracy as no unnecessary pieces of tool restrict your eye line Accurate The pin-directed force for safety and efficiency It's designed for use with a hex key L wrench allowing you to find the best possible angle for leverage It's made of aluminium alloy weighing only 25g, and its bullet shaped design makes it easy to carry in your pocket