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PowerLink ®
From WikiPedalia
A SRAM trademark for a special master link which can be disassembled without the need to press out a rivet pin, making it easier to clean the chain. A Power link also will work with other brands of chain, though it has been reported that problems can occur with thin chains made for 9-speed cassettes. For 10-speed chain, with its thin side plates, SRAM makes the PowerLock, good for one-time use only.
