A stylish fitch fastener used to secure your sash window. The fastener has a locking mechanism by way of a grub screw. Supplied with matching SS wood screws. The keep is fitted to the bottom rail of your sash window, and the fastener rotates into it when the window is in the closed position. Fixing plate: 64mm x 15mm Keep plate: 64mm x 15mm Projection: 25mm