Wright Product's Keyed Surface Mounted patio door latch is reversible for right or left hand application on doors 3/4" to 1-1/4" thick. This latch requires installation Hole Spacing of 1-3/4", Installs In Three 5/16" Holes, Contains 2 Sizes Of Strikes & Shims To Provide Adjustment For Latching, Comes with a key lock for extra security. This latch has a no lock-out feature.