The overall thickness of the Orbitkey 2.0 hardware is now as slim as 1.65mm to create an even smaller volume in your pocket. The form of the locking mechanism has been simplified so that it is smoother and your thumb sits nicely into the concave surface. The "D-Ring" form has been softened and curved to avoid scraping the beautiful leather. You can fit from two to seven keys in your Orbitkey. The max key size is 2.5in (64mm). Orbitkey allows your to organize your key in an order that will never change for easy access.