Clever Standard is a product designed in Japan and manufactured by machining in hardened resin. It is designed to open "Quick link" type chain quick links. Although the manufacturers claim that these links are for single use only, we have all opened them at one time or another and reused them again. For this type of operation, without the risk of bending or mishandling the chain link, this tool has been created. Fortunately by design it is possible to integrate two disassemblers which gives you a very usable 2x1. They weigh 60 grams per pair and measure 130x20x20mm. Suitable for all types of chains.