The hook style recessed handle set includes a keyless exterior handle and is not manually operated. This makes it can be used on left and right sliding patio doors with door lock Size: lock length 7.8 inches / 198 mm. Hole spacing: 6.6 inches / 168 mm. With all necessary screws and fasteners for installation. Function: sliding door and window handle lock. Up and down slide switchApplication range: all kinds of sliding doors and windows