Cup Burs - Wire Rounding Tools

Cup Bur - Wire Rounding Tools Before forming wire, take a moment to round the end using a cup bur. This is especially important on the end of an ear wire to clean up the ragged cut end. Also, use on balled wire rivets to clean up the head. Use Cut Lube on the bur to keep it cool. After rounding the end, inspect using magnification. If the wire is not cleanly rounded, give a few more twists.