Screw Jack Opener SKU: Screw Jack Opener Available to OrderOut of Stock Pinit Quantity discounts available QuantityPrice Quantity -+ Add to Basket DescriptionScrew jacks effortlessly wind open your conservatory roof or skylight windows.No need for additional locks, these will act as a locking mechanism which cannot be physically pulled apart.Precision engineered from high grade brass.DocumentationTechnical DWG Drawing: DownloadTechnical PDF Drawing: DownloadData Card: Download