【DIFFERENT KEYS and Thumb Turn Lock】If you order more than one piece, they will come with the different keys, NOT the same key. You can unlock with keys from outside while inside can be unlocked with thumb turn button. Suitable for doors that require lock. 【Reversible】Reversible handle is suitable for both left and right handed doors. 【Easy Installation】No need for professional tools and come with all the hardware and drilling template needed (please check before installation). All you need to prepare is a screwdriver (not included) and you can install it in minutes by yourself！ 【Intended to Commercial Use】 Commercial Grade 2 Satin Chrome 26D, and UL 3 Hours Fire Rated. Absolutely Solid and heavy duty. Any problem, please contact us. We’ll reply within 12 hours. 【70mm Backset】 Backset is 70mm (2-3/4"). Fit door thickness: from 1-3/8” to 1-3/4” (35mm to 45mm). Product Description： 【Application】-- NEWBANG HARDWARE Commercial door levers are usually used on door of large traffic facilities such as Schools, Hospitals, Libraries, Hotels, Airports, Government Buildings, Retail, Multi-Family Buildings, Condos; and also, you can use it for replacement and upgrading. 【Certification&Qualify】 UL LISTED , which ensures the reliability and durability of the product. And fire Rated up to 3 hours. *Left and Right HANDED (fits both Right Hand and Left Hand Doors) *Backset: 2-3/4”(70mm). Fit Door Thickness: 1-3/8” to 1-3/4” (35mm to 45mm) *Front Stainless Steel Strike Plate: 4-7/8” x 1-1/4”/1-7/8”(123mm*31mm/46mm) *Strike Plate on the Latch:2-1/4” x 1-1/8” (57mm x 28mm) *More size and Pre-drill:Please see the template in box or the size picture What’s in box? * Installation template and instruction * Pin to detach the handle before installing *Screws for installation * Door Lever Set *Strike Plate *70mm Latch