Check the listing for details. Mayville Engineering CO 8948 MEC Reloading Tool Kit Maintenance Kit. Color: Black, Condition: New. Listed at 44.04 USD. Mayville Engineering CO 846212 MEC 12 GA Spindex Kit MEC Outdoors (Mayville Engineering Company) has been manufacturing shotshell reloaders under the MEC brand since 1955 in Mayville, Wisconsin. Over the years, we have manufactured millions of shotshell reloaders from single stage to fully progressive units. Our MEC Clay Target Machines were introduced in 2013 and a few years later, in 2016, we expanded our line to include the MEC Marksman metallic reloader and accessories. Mec Black Wad Guide Fingers for 12 Gauge Reloader, Black - 830020 Black wad guide fingers for 12 gauge mec reloaders. The precision built one-piece Spindex Crimp Starter is made of rugged Celcon. The new Spindex Crimp Starter rotates automatically and realigns perfectly on the original crimp of the shell. In addition, it can be changed from 6 point to 8 point in a matter of seconds.