Greenlee 4XT-54 D'VersiBIT Extension, 1/4 by 54-Inch
About the Greenlee 4XT54 Drill Bit Extension Tool 1/4" x 54"The Greenlee 4XT54 Extension Tool is used to connect to the chuck end of the D'VersiBIT shaft to increase the length of the bit. For 1/4" (6.4 mm) diameter shafts.