Way back in 2014 while attending a CIA launch in Champaign, IL, I witnessed many low and mid power rockets that were rod-whipping in every direction due to the wind.
Mini-buttons were devised after that launch on the long 2 hour return trip. After some research, I found a way to make a rail button that would work on smaller rockets!
Mini buttons were first and then when asked to make something smaller, I came up with micro buttons shortly after that.
Since many were asking for it, the next step in the evolution of mini-buttons was to make a 1 piece button instead of the three piece buttons. These were introduced in early 2020 and have been a big hit.
Mini-buttons are available in a 3 piece nylon version and also the new 1 piece Delrin version.
Both are designed to be used with the 80/20 20mm rail.
(They may not work with some of the off brand extrusions, use genuine 80/20 extrusions for best results)
They are about 1/3 the size of a standard 1010 railbutton and designed with mid power rockets in mind, but have been used successfully for some high power flights as well.
Micro is the key word for Micro-buttons. They are a two piece nylon button designed for low power rockets.
They work with the Makerbeam 10mm rail and also the new Makerbeam XL 15mm rail.
Both styles of that rail are available through Amazon.com.