The universal scratch bar attachment

This part is an attachment for RC bike scratch bars. There are 3 ways to mount it to the bike. 1. M3 Screw from the bottom of he attachment thru the frame and a nut from the inner side of the frame. 42mm point to point. 2. Inner holes. M3 Screw thru the attachment and thru the frame and a nut from the inner side of the frame. 24mm point to point. 3. Inner holes. M4 Screws from the inner side of the frame screwed into the attachment. 24mm point to point