Compatible with all of 25mm (1 "inch) Ball Head(Male type)Mounts(Adapters) Ex) Competible with Fitclic Neo /REC-Mounts /RAM Mount/Quad Lock/SW-Motech/SP-Connect . Need extra Arm (Extender) with Head mount too Designed for Yamaha YZF-R3 fork stem hole(2016+) It is easy to install with the Carbon Still Bolt insertion part, and the mount is very tight to fix. Size & Fit 1. Fit Yamaha YZF-R3 (2016+)fork stem hole 2. Need Socket Wrench for 22mm(Remove) and 17mm(Install). 3. Need for Extra Arm(extender) with Head parts too(phone mount,Camera mount) 4. Fit 1inch(25mm)ball Mount base gives you a 1" (25mm) ball fitting which is compatible with RAM motorcycle mounts, Ultimate Addons & SW-Motech solutions.