This is the Haweka ProGrip with Turning Handles Quick Release wing nut of all types of wheel balancers. Made in Germany, Haweka is well known as the best quality aftermarket wheel balancer parts manufacture. The wing nut is one of the most common replacement parts on wheel balancer the wing nuts are replaced several times during the useful life. One major advantage in Haweka is they offer replacement spare parts for there wing nuts. Usually the teeth that grab onto the shaft wear down and cause failure.
The wing nut is available in multiple sizes from 28mm to 40mm.