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The benefits of stabilized accelerating struc tures, with regard to the manufacture and operation, have been well documented. The four-vane radiofrequency quadrupoles (RFQ) presently being designed and constructed in many laboratories are not stabil ized because of the weak electromagnetic coupling between the quadrant resonators. This paper presents a simple technique developed at the Lawrence Rerkeley Laboratory using vane coupling rings (VCR's) which azimuthally stabilize the RFQ structure and greatly enhar.i its use as a practical accelerator, in particular the VCR's: o Completely eliminate the dipole modes in the frequency range of interest; o Provide adequate quadrant balance with an initial precision mechanical alignment of the vanes; o Enhance axial balance and simplify end tuners. Experimental verification tests on a scale model will be discussed.