The Intelligent Hardware concealed round turn and release is designed for bathrooms. Dual Finish: Polished Chrome & Black Nickel. Dimensions: 51mm Rose diameter, 10mm Rose Thickness. Supplied Complete With Fixings And Spindle Bar. This product is designed to operate the bolt within a standard bathroom lock or tubular deadbolt. The Premium Black Nickel Collection has been manufactured by our supplier Intelligent Hardware who offer the perfect hardware solution for any standard internal door as it is made up with a collection of door handle packs and accessories that contain everything needed for a simple, effortless instillation process. The PCP/BNP Bathroom Turn & Release is compatible with all of the lever on rose handle packs from this collection, which together will create a beautiful contemporary look and feel for any styled internal door.