This is a 5-Lever BS3621 replacement for the Chubb 3U114E, which comes with a whopping 15 year guarantee! Available in two sizes 64 mm & 76 mm also some rebate kits for sets of rebated doors are available. Two types of finishes Brass & Satin Stainless Steel. Union Locks another old kid of the block set up by Josiah Parks back in the 19th centu..