Features and Benefits: Now including T-45, T-50 and T-55 sizes; Ten hex insert bits with two bit holders; Seven smallest bits are used with the 1/4" bit holder; Three largest bits are used with the 3/8" bit holder; All twelve pieces come in a convenient vinyl holder; Ten hex insert bits with two bit holders. Seven smallest bits are used with the 1/4" in. bit holder. Three largest bits are used the 3/8" in. bit holder. All twelve pieces come in a convenient vinyl holder. Includes Torxr sizes T-10 thru T-55.