Stanley National Hardware CD4 Turnbutton， 1.75-Inch， Galvanized<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Designed to hold combination windows and screens in place</li><li>Heavy extruded aluminum clips fit most storm doors</li><li>Aluminum thumb screws provide for easy application and removal</li></ul></div><img src="http://ecx.images-amazon.com/images/I/414JrkkagPL.jpg" noproxy>