This is an authentic Dynabrade replacement part that has been sourced from the original manufacturer to be used with portable vacuums. The carbon brushes are used to relay electricity from the switch to the armature assembly. The brushes are sold in pairs because two are required.
This is a genuine, Dynabrade replacement part. The male plug is made of steel and connects onto the portable vacuum coupler. This part is sold individually, and a wrench is required to replace this item.