Emtek, 810ASE, Passage,Oil Rubbed Bronze, Astoria, Knobset Astoria Emerald Crystal Passage Knobset with Brass RosetteEmtek s passage knobsets use traditional American latches complete with a variety of trim styles, handcrafted from authentic materials. The knobset is operated by a knob from both the interior and exterior. With the passage function, the door does not lock from either side. Uncompromisingly rugged and beautifully crafted, these locks are suitable for the very finest homes. These stunning crystal knobs are reproductions of early American designs. Each knob is hand polished and fitted to a sturdy and attractive brass rosette. The latches are heavy-duty die cast construction, with strong internal springs, solid brass nose bolts, and sintered metal cams. A plastic bushing located in the joint between the handle and the rosette ensures a friction-free wear surface, preventing metal from bearing on metal and providing smooth, long-lasting operation. Handles are positively connected to rosettes with a permanent clip. Each has a set screw which eliminates handle wobble when tightened. Emtek s threaded tubes are machined brass to ensure good threads and prevent corrosion.Features:Standard Door PrepCrystal Knob with Brass RosetteSpecifications:Knob Diameter: 2Projection: 2-5/8Material: Crystal and Solid BrassDoor Thickness: 1-3/8 to 3 (please specify)Backset: 2-3/8 or 2-3/4Emtek is dedicated to bringing interesting, well made hardware back into American homes. Emtek s mission is to satisfy the higher expectations of today s homeowners with regard to door locks. They strive to provide a broad and interesting range of products that consumers can use as elements of decor, and not just as a way to latch a door.