This latch can be switched either two course : Push the spring of NO1 until the latch pops out, then replace the direction.How to come to a decision design "with hook " or "No hook "If desire no hook lock ,PLS touch us loose .About length :Kindly note:1. Description :1) Material: iron + brass latch +SS pannel2) Color: as photo3) Size : 60/684) Features :Anti-theft ,Anti-pry ,Anti-Violence open door lock part2.Transition:1 cm = 10 mm = 0.39 inches3.About color :Depending at the gentle and the screen, the color of the article may be barely diverse from the color of the picture.4. About the size :Allow 0.5-2cm distinction thanks to guide measurement5.About huge order :if there's big order ,welcome to touch us unfastened .TKS .