The Hawke eccentric wheel is a direct replacement for the stock wheel.
User removes hub and rubber compression ring from stock wheel and replaces it with this wheel.
This wheel fits the Hawke Sidewinder 30 IR scope, not the Airmax 30 and ED , or the new version of the Sidewinder with the three screw locking ring. This is also a different model than the newer Sidewinder H5 scope.
