Made from Solid Brass. Lever Handle for internal doors where locking is not required, If you are replacing an existing Lever Handle, this Handle will work with a Standard UK Tubular Latch. For new doors you will also need to purchase a Tubular Latch in a size to suit your door. For a 2 1/2\" Tubular Latch purchase a YKTL2-AT or for a 3\" Tubular Latch a YKTL3-AT. Where Privacy is required please use a separate Thumb Turn and Release (eg. reference RS2030K-AT) with a Bathroom Lock (Reference YKBL2-AT, or YKBL3-AT). 10 Year Mechanism.