Ultimate Addons Locking Strap (sku 14195) The Locking Strap is the most universal mounting option that the Ultimate Addons range offers. So versatile, allowing you to mount mobile phones, GPS SatNav devices & tablet PCs to the most awkward cart or trolley framework & irregular sized handlebars. Simple yet effective design incorporates a 3-prong attachment system enabling any of the Ultimate Addons cradles, holders or waterproof cases to be added. Suitable for square, oval & round handlebars, frames, poles or bars. Fits a minimum diameter of 21mm (0.83") & a maximum diameter of 40mm (1.58").