Optiline Screw, Duo Lock mount for mounting on stem, brake or handlebar clamp. Features With threaded pin M6 or M8 & matching spacer Stainless steel screws in various lengths included Fully adjustable, allows phone to be used & viewed both vertically & horizontally Compatible with all Optiline Duo-Lock accessories, sold separately Optiline Duo Lock System Patented modular interchangeable Duo Lock system Universal or specific cases, resistant, rainproof & with input for charging cable Wide range of mounts & combinations for your vehicle One of the advantages of this line is the modular system, which allows the use of the same case on multiple motorcycles, just by buying an additional mount & not the whole set. Also, in case of another phone, you can simply buy another case without changing all the mounts.