This is a Park Tool folding chain cutter. I used it with 9-speed chains, I don't know if it works with other chains. It's heavy for a portable tool and was difficult to use (125g). The screw is stripped and held in place with Teflon tape. I was keeping it as part of my collection, but I'm selling it to organize my toolbox. Due to my busy schedule, I will not respond to price negotiations. Price changes will be made at my discretion and timing. Also, I cannot accept returns or refunds. Shipping is listed as 2-3 days, but it may take 4 days depending on the timing. It will be shipped via Yu-packet, so it may take a week to arrive. Thank you. #ParkTool #ChainCutter #ChainTool