Dr. (149 Piece) [16461]. Manufacturer Part Number : 16461. MPN : 16461. 6 x 1/2" sq. dr. Draper TX - STAR® bits: T30, T40, T45, T50, T55, T60. 1 x 1/4" sq. dr. spinner handle. 8 x 1/2" sq. dr. Draper TX - STAR® tamperproof bits: T30, T40, T45, T50, T55, T60.