Rego-Fix nuts E / EP/ EM spanners EMS / EAX spanners HI-Q®/ER 11 – ER 20 nuts HI-Q®/ER25 – ER 50 nuts HI-Q®/ERC11 nuts HI-Q®/ERC16 – ERC20 nuts HI-Q®/ERC25 – ERC40 nuts Hi-Q®/ERM nuts with reduced dimensions Hi-Q®/ERMC nuts with reduced dimensions for int. coolant Nuts for highest RPM