Consisting of Tubular Latch (see description for 911.67.8xx) and Lever Handle Diameter 7/8"; rosette diameter 2-9/16". Nylon rose base with friction grip ring, rotating on nylon bearing. Secured with concealed through-bolt fasteners designed to prevent bolts from loosening. Lever rotating on nylon bearing. Outside lever handle locked by inside button; unlocked by turning inside lever handle or from outside with narrow tool (emergency release).