Draper expert schroder 1 4 square drive x 1 4 hexagon magnetic bit holder draper expert 33812 b i expert quality i b 1 4 female x 1 4 male magnetic bit holder for use in power drills and driver handles shaft from chrome vanadium steel hardened and tempered magnetic bit holder made from chrome plated brass for 6 35mm 1 4 hexagon insert bits in accordance with iso1173 packed in polybag draper expert 33812 schroder 1 4 square drivex1 4 hexagon magnetic bit holder