AMPS Brass Mortise Lock Set 275mm with CY Lock 250mm AMP - MP11 - Brass Mortice Lock Set, CY BIg, Antique Finish , Door Thickness 30-45 MM. ML8(U) 5 Ultra keys CY Mortice Locks, Metal - Iron and Brass; Size 250 MM; Door Thickness 30-45 MM; Finish Electro Coated Body & CP Cram, Durable and Long Life, Good Quality Mortice Lock Set From Renowned Brand AMPS. AMPS, an ISO 9001 certified Company is a well known name in domestic hardware market for more than last 35 years. Company provides a wide range of mortice locks (both lever & pin cylinder) Mortice Handles (Brass, SS, Zinc & MS), Door Locks, Furniture Locks,Brass Aldrops & Door/Window fittings.