This sliding screen door handle and latch is non-handed and used on 1/2 inch thick Columbia doors, as well as a variety of other patio door manufacturers. It contains an inside pull and outside pull. The handles have mounting holes that are 3 inch on center, and the spring-loaded nylon latch rotates up and down to engage the keeper. Latch can be locked from the inside by the security lock. For 1 inch thick Columbia door see Prime-Line part A 157.