With the farhop 9mm mount you can trust that it will have strong hold no matter the situation with it's included adjustable tightening screw. This unit is sturdy when screwed down and practically indestructible. It has a sleek surface which allows your units to glide easily in and out as long as it does not exceed the 9mm threshold. There is an included hex wrench so that you don't have to search your toolbox for a compatible tool to make adjustments. It's compact design makes for an easy fit in most situations. The aluminum compound helps dissipate heat and insures the longevity of the unit.