These work great for 37mm motors. 6 mounting screws for these motors is a bit overkill, but works. One complaint is that they were not exactly 90 degree angles so they all had to be adjusted to have the motor shaft parallel to the base. Finish was acceptable, although a bit inconsistent from bag to bag. Not a problem for my project but something to keep in mind if aesthetics is important to your application.
Worked well.