Prime-line E2317 Passage Door Latch Glass Knob Set with Latch Bolt This passage door set of glass knobs is used indoors to match old style mortise lock sets Features 2 in. outside diameter knobs with 1-15/16 in. projection and 17/64 in. x 3-1/2 in. square spindles Clear glass fluted knobs with brass plated steel components Glass, steel and diecast components