1. PASSAGE FUNCTION: Commercial lever door knobs with locks from Hardware are available for specific entrances. This "Passage Function" variety is used in applications where the lever is unlocked on either side. 2. COLOR & SIZING: Our commercial door locks are ed in Satin chrome finish (26D finish). Fits Doors 1-3/8" to 1-3/4" (35mm to 44mm) Door tickness and come standard with a 2-3/4"(70mm) backset. These are non-handed commercial door levers, so they are suitable for either right- or left-handed doors. 3. SPECIFICATIONS: Our door hardware & locks come with standard ANSI 1-1/10" x 2-1/4" square corner strikes and 1-7/10" x 2-3/4" square corner faceplates. The backset is 2-3/4" (70mm), the stainless steel Roses are 3-11/32" (85mm) in diameter, and Latchbolt Stainless steel is 1/2" (12.5mm) throw standard. These specifications make our door lever handle lock fitting for 161 door prep & regular 2-1/8″ bore prep. 4. CERTIFICATION: Designed to be a reliable commercial door hardware, our heavy-duty entry key locks are ANSI/BHMA A156.2 - Grade 2 (exceeds 500,000 cycles) certified and UL listed. Each lever door handle with lock is made to meet A117.10 accessible design standards. It is also fire rated for up to 3 hours. Our commercial door locks meet the needs of home/business owners, apartment managers, contractors, maintenance facility managers, handymen, locksmiths, and property managers. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store