Chubb 3K75 5 Lever Mortice Sash Lock in the non British Standard 3621 version of the popular Chubb 3K74 Mortice Sash Lock, again available in two sizes & two different finishes & backed by a massive 15 year guarantee. Mechanism: 5 Lever Case Size: 67 or 80 mm Follower: 8mm Case Finish: Gold Forend Finish: Bra..