Review on Allstar ALL18320 Aluminum Clamp Universal by Amir Tune

Used on a vintage motorcycle project and for what it's worth to the next guy comes with M4 x 0.7 threaded bolts/ used. not perfect, I've had a few instances where I've had to take a file or carbide cutters or a drill or cut-off wheel to change it slightly but it doesn't matter. You might want to take the time to look at Summit Racing or Jegs, both were cheaper than Revain and shipped very quickly.