Rusted, Painted, or coated fasteners can present unique problems. Apex ACR insert bits utilize wing face ribs to grip the recesses of the fastener which reduces stripping, cam out, and damage to surrounding work pieces. ACR insert bits are offered with textured ribs for screw removal, driving, or both. They are also available as a power bit. Apex bits and fastener tools are made of high quality tool steel and manufactured in the USA.