Solid Aluminum Alloy Handle : Crafted with a solid aluminum alloy handle and a vibrant paint finish , combining durability with an attractive appearance Specific Compatibility : Designed for plastic steel inward opening windows (windows that open into the room) . Requires : 30 mm width for the base , 6.9×6.9 mm thick square shaft , 35 mm exposed spindle length , and 43 mm center hole distance for installation 4 Gear Adjustment : Fully rotatable (360°) before installation , 4 gear to rotate adjustment , suitable for both right and left hand applications Easy Installation : Rotating screw hole cover enhances seamless aesthetics after installation . Easily operated by lifting both ends and rotating What You Get : The package includes 4pcs window handle lock and 8pcs fixing screws . It is enduring and not easy to break, Weight: 1.54544045662 Pounds, Manufacturer: PATNFR