S4000 Finish: Aluminum Features: -Slide window lock. -Material: Aluminum. -Heavy-duty extruded aluminum with single thumbscrew. -Securely locks window in closed or ventilating position. -Easy to install. -No tools required for installation. -Includes thumbscrew. Specifications: -Length: 0.94". -Width: 0.94". -Dimensions: 5.43-5.44" H x 3.81" W x 1.13" D.