If your chain has a masterlink and it’s not a Connex chain, you need this tool. It will break open the chain’s masterlink, and you won’t have to yell and throw things around the shop when you try to use a really small needle nose plier to do the same thing. Cause it doesn’t work. These do the job easily. The Park ones are less expensive, but the handles are made of some crinkly rubbery tool dip that feels icky. The Unior Chain Pliers are plated for long life, have nice feeling handles, and just are a generally nicer tool. Good tools are always worth the money, I’ve found. Longer life, more fun to use, easier to use… that sorta thing.