UNION 13mm Rebate Kit to suit StrongBOLT BS3621:2007 5 Lever Sashlock - Satin Chrome

Great for rebated double doors

Works perfectly with the union sashlock, to allow for doors that meet on a rebate. Comes with 2x lock keeps, left and right handed, for either situation. My only criticism is that the lock is packed out with some fiddly black plastic bits, I stuck them on with tape, surely there's a better way? That said, great kit.