Better hold, less effort. The whole system has been engineered together to keep the mirror from moving, except when it has to in an impact. Radial Ridges. The clamping surface at the base has radial ridges to hold the ball more securely. These ridges prevent the arm from unintentionally rotating relative to the base, but without mechanical interference that could be damaged under impact. Asymmetrical Clamping. Because the ball diameters are different, the clamp is located off-center toward the mirror. The larger base diameter creates more stiffness at the bottom, and the offset clamp grips the mirror tighter to equalize rigidity. Easy Adjustment. Our low-profile thumb nut is 25% longer to make adjustments easy, even when wearing gloves. Perfect for aggressive riders- long enough to see, but small enough to tuck away. Compatible. Mirror end 1" socket works with any 1" ball accessory (GPS, Camera, etc). Base end works with upgraded 1.125" ball kit. Doubletake Arm 2.0 Specifications Length eye to eye: 50mm Length overall: 75mm Weight: 55g Material: A380 Die Cast aluminium View our entire range of Doubletake products here.