We offer 1 piece Delrin Railbuttons in both the 1010 size (some companies call this a small railbutton) and also 1515 size (some companies call this a large railbutton).
We are happy to say that they are manufactured in the USA!
We have them injection molded by a family owned business right here in Indiana!
The 1010 railbuttons is designed to be used with the 1010 aluminum extrusion from the 80/20 company. The rail is 1" x 1".
1010 buttons work well with large rockets weighing up to 35-45 lbs.
Depending on the rocketeer you ask, the maximum rocket weight where a 1010 railbutton should be used will vary.