AS4309 Stainless Steel. New from Asec, this Digital Lock from the AS4300 Series features the quick and easy code change function, allowing users to change the code without removing the unit from the door. It is supplied complete with a 60mm tubular latch and it is suitable for medium to heavy duty use on internal or external timber doors, with 12 large indented buttons. It is suitable for either right or left handed applications, with a free turning lever handle which protects against force. It has a key override feature for maximum user convenience and also a free passage mode.. Key override option. Quick and easy code change. Free turning lever handle - protects against force. 1000+ combinations