Lock body with anti-misoperation. Lock body has single or double hook piece, in addition,can be equipped with different extension rod,suitable for door fans of different height. Rollers available in a variety of styles and configurations. Multiple options for the handles & keepers of this sliding door, such as outer handle with inner handle, outer keeper with inner handle, handle with cylinder or not,and so on. Handle & keeper material are alum alloy, surface treatment is optional colors by powder coating.