Barefoot Buttons are the solution to your pedal footswitch problems! Barefoot Buttons fit on most major switches and triggers making your effects pedal easier and more comfotable to use while increasing engagement accuracy. These simple to install buttons are a must for all musician who use pedals. The Version 2 size works well in a variety of situations providing increased surface area to engage your switches. (Please tighten set screws lightly when installing acrylics). Size 5/16" / 8.5mm.