Sure-Grip V-Grip Spinner Knob

Excellent build quality. Having the spare extra spacers and longer bolts included is a nice bonus. Bearings in the mount are a huge improvement over my old MPD tri-pin. Clamp design also mounts to the wheel 10X easier. To make the v-grip work well for me, because of a lack of grip strength, I tightened the grip as much as possible and added some foam padding to the flat side.