Salto XS4 Original Narrow Proximity Contactless RW Access Control Lockset. 40mm Backplates. Outer handle with clutch. Engages to open with valid card/fob. Inner handle always free to open. Thumbturn on inner plate to operate a deadbolt at 85mm centres. Lock status microswitch connector. U shaped lever. Satin stainless steel finish. Progammable at door or via software. Use with Salto Hotel mortice lock. Door thickness 45-60mm.