I think I know what lock you have but a photo would help,if you could send 1 send it to shaun@sdwupvcrepair.co.uk.right first of all is your espag lock broke,hold on to one of these pins as you turn your handle to see if it moves ok,if its loose and dosnt move you need a new espag,write down make and any other numbers or words and order one,if it moves ok take screws out of keep(recesses) and move keeps closer to pin then screw back in and should be fine
shaun sdwupvcrepair.co.uk
May 2008