Full Bore Dzus buttons are the Cadillac of buttons. You can’t slip off these buttons and scratch your paint when you are using the Full Bore tool or an allen wrench. The only way we could improve on them was to plate them! These are .500 reach with a flat head for use with double plates and countersunk applications. They are the most widely used size, but if you are unsure, give us a shout and we’ll show you how to measure your current buttons.