APPLICATION:These bit holders are the perfect addition to any power drill or driver,offering extended reach with a powerful magnet that securely holds bits in place during use with a variety of holder lengths and a two-piece design.This set is an easy to use and versatile addition to any tool box. SPECIFICATIONS: This WAYWIN Magnetic Bit Holder set comes with three 1/4 inch hex shank with Rataining Ring Magnetic bit holders for use with your favorite tools.This set includes adapters with lengths of 12 inches as well as a small rubber holder to keep your adapters together in one place.