There are ten (10) pieces in this package. A hole protector is primarily used to prevent the cable from cutting into the edge of the hole when the cable enters the hole at an angle. This may be the case when the cable transitions from a stair to a level run. Another instance is when the cable goes aroung a corner that has two corner posts. The cable will slide easily at angles up to 45 degrees. Fits into a 1/4" hole.