【Privacy Deadbolt】You can see red(IN USE) from outside if it's locked from inside or see green(VACANT) from outside if it's unlocked from inside. Inside can be locked with thumb turn button. But outside can be unlocked with flat pin key when emergency. Suitable for doors that require lock and privacy from inside. 【Commercial Grade 2】 Commercial Grade 2, Satin Chrome 26D, and UL 3 Hours Fire Rated. Very heavy duty and absolutely solid. Any problem, please contact us. We'll reply within 12 hours. 【70mm Backset】 Backset is 70mm (2-3/4 IN). Fit door thickness: from 1-3/8 IN to 1-3/4 IN (35mm to 45mm). 【Reversible】Reversible for both left and right handed doors. 【Easy Installation】Every package comes 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 even not handy！ Product Description： 【Application】-- NEWBANG HARDWARE Commercial door deadbolts are usually used on door of large traffic facilities such as Schools, Hospitals, Libraries, Hotels, Airports, Government Buildings, Retail, Multi-Family Buildings, Condos; You can use it for replacement and upgrading. 【Certification & Qualify】 UL LISTED , which ensures the reliability and durability of the product. 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