For the H4.0 Rotor-Clamp ring, the Micro Rotor has a Wheel-span 60% smaller than the Regular Rotor Wheel, and comes with a handy Allen wrench. The Micro Wheel is just $7.95, and is great for 2 specialty scenarios.
SCENARIO 1: H4.0 AS A PENIS SHAFT RING FOR SEX
For the guy that wants to wear an H4.0 on his penis shaft (at the root) during sex, the Regular Rotor Wheel with its easy-to-grip size and texture may bump his partner during deep grinding thrusts. The H4.0 is designed primarily for behind the balls wear during sex (where the ring is around the man’s full package: cock and balls)… in which case the Regular Rotor Wheel is perfect. And the regular wheel's awesome easy-grip lets you adjust the constriction on the fly. If you’re going to wear the ring on your shaft, however, you and your partner may want the Micro Wheel, which can be easily swapped in place.
SCENARIO 2: H4.0 IN A BONDAGE SCENARIO
The Micro Rotor Wheel comes with an Allen wrench key, because while it is still technically finger adjustable its tiny head makes finger adjustment more of a challenge. So, for the guy that wants to feel locked into his ring, who wants his mistress or master to clamp him in place and keep the pressure on until they say otherwise, the Micro wheel with its Allen key is a great way to put the control in someone else’s hands.
*With both rotor wheels you can choose whichever wheel you like best for whichever scenario your are in.