Emtek Modern Brass Key In Leverset - Helios Lever with Rosette Options - Dummy (Pair)Handing is Required for LeversetsSpecifications:Door Thickness: 1-3/8" to 1-3/4"Mount: Surface Mount (no door prep required)Material: BrassManufacturer Resources:EMTEK Passage & Privacy Knobsets and Leversets Dimensions/SpecificationsCF2.0 Passage & Privacy Knob/Lever Installation GuideEMTEK Passage, Privacy & Dummy Knob/Lever Installation GuideEMTEK STRETTO Sideplate Lockset Technical Specifications