First of all, unplug the angle grinder and place it upside down on a work surface. Look for the shaft lock. Push down the shaft lock button and remove the bolt on the center of the grinder using the wrench. Now take off the nut, washer, and any other abrasive wheel present. Now hold the shaft lock with your hand and thread the nut on the wire wheel brush onto the threaded shaft of the angle grinder. Tighten the wire wheel using a wrench. Voila! The wire wheel is now attached to the angle grinder.