The 1/4-20 has two optional M3 x 8mm button head screws. These are screwed in on either side of the 1/4-20 screw using the supplied M2 Allen key. They are used if you have a camera that has the Arri mounting pins holes in its base.
The Mini Rosette angle is adjustable so it can be used for handlebars and also for seat posts.
||Medium (22 - 28mm / 0.87" to 1.1")
||Large (30 - 35mm / 1.2" to 1.4")