DRILL BIT HOLDER CAPABLE OF BEING USED IN ELECTRIC SCREW DRIVER

摘要

The present invention relates to a drill bit holder used to an electrical screw driver. The drill bit holder can install various sizes of drill bits in one holder and, more desirably, can selectively install different sizes of two drill bits in one holder. A drill bit installation groove formed on the drill bit holder receives the two or more drill bits having different diameters.