We started making headsets in 1976 and have been refining them ever since. Our DropSet™ 2 is built to be precise and dependable and sets the standard for quality integrated headset function delivering precision performance that is built on the same pedigree of Chris King headsets from the past 40 years. Compatible with modern Pinarello, Open, 3T and more. Engineered, manufactured and assembled in Portland, Oregon USA Lifetime warranty Legendary made-in-house bearings Patented GripLock® retention design for exclusively reliable headset adjustment 42mm 45x45 upper bearing 52mm 45x45 lower bearing Compatible with our baseplate and 45 degree integrated crown races