I have only been back into regular biking since I retired two years ago . Previously , I had always used three speed equiped bikes , so I am new to derailleur equipped machines . I replaced the chain on my pedal bike about 3 months ago . It came with a type of joining link that was new to me . To fit this link , you insert it through the chain ends , and then the separate side plate is pressed into position with a click and the job is done. you have to sort of bend the chain sideways to fit this last part . The problem is , I would now like to split the chain to clean and lube it . Can someone tell me how you get it off , or is it a case of a one shot device and I now have to use a chain splitter ?