Lightest conventional armature bar will produce the highest speeds without closing out point gap. Eikon Conventional Armature Bars Conventional system of spring mounting allows you to adjust the angle of deflection on front and back springs to customize each application. All Eikon Conventional Armature Bars are precision machined from 1018 low carbon steel with a rust resistant black oxide finish complete with a #8-32 screw and washer. Made in Canada