We make these billet aluminum handles from USA made 6061, then have them anodized and we finish machine them for that cool contrast cut look. They take a standard 1/4" hex bit so any 1/4" hex bit will work with the handle. These come standard with your choice of a 3/16" Allen driver that works with your Allen head DZUS buttons or a slotted style bit for all of your standard DZUS buttons.