For more than 90 years, Schlage has built a legacy of providing security, quality and innovation to homes and businesses. This Dexter by Schlage twin security set features two JD60 Grade 3 deadbolts and two J54 keyed knobs all keyed alike. All locks in this set are backed by our limited lifetime mechanical and 5 year finish warranty. With products that meet the highest industry standards, Schlage hardware is made to protect your home and give you peace of mind that only comes with products that stand the test of time. Security, quality and convenience - it is easy to see why Schlage is the most preferred residential door lock brand by consumers* and brand most used by builders.** (*Nooro Research , independent research funded by Ingersoll Rand Co., 2011 **Builder Magazine, 1998 - 2011)