54pc Pro CRV Tamperproof Star / Torx, Hex / Allen & Spline Bit Socket Tool Set Features: Set of top quality Hex, Spline & Star bits, with 1/2" & 3/8" Drive adapters For ease of use. Designed For the professional, the design not only looks good, they perform just as well, and are designed For heavy duty use. With the most common sizes included in this set, you will always have the correct tool For the job, and with both 30mm and 75mm bits, they are ideal when extra length is required. Supplied in a metal storage case, they are the ideal addition to your toolbox, and make an excellent gift For the mechanically minded. They can be fitted to any 1/2" or 3/8" drive socket, so can be used on ratchet handles, extension bars, T-bars etc, For those hard to reach places. Includes: 1/2" & 3/8" Drive Bit Holder adapter Hex Bits: 30mm - H4, H5, H6, H7, H8, H10, H12 75mm - H4, H5, H6, H7, H8, H10, H12 Spline Bits: 30mm - M5, M6, M8, M10, M12 75mm - M5, M6, M8, M10, M12 Star Bits: 30mm - T20, T25, T30, T40, T45, T50, T55 75mm - T20, T25, T30, T40, T45, T50, T55 Tamper Proof Bits: