Need an ignition interlock device near Hortonville? Intoxalock is available at The MRC Group, a certified Intoxalock ignition interlock installer. We can install your breathalyzer in cars, trucks, vans and other vehicles.The MRC Group is an independent sales agency representing suppliers to the automotive and industrial market. We were established in 2005 and have grown to five companies with manufacturing capabilities that complement one another. In addition, we have been installing Intoxalock ignition interlock devices since 2011.