Set Includes: (13) 6-Lobe Tamper-Resistant Star Bit Sockets: ATD-140 - TT08 1/4" Drive; ATD-142 - TT10 1/4" Drive; ATD-143 - TT15 1/4" Drive; ATD-144 - TT20 1/4" Drive; ATD-145 - TT25 1/4" Drive; ATD-146 - TT27 1/4" Drive; ATD-147 - TT30 1/4" Drive; ATD-148 - TT40 3/8" Drive; ATD-149 - TT45 3/8" Drive; ATD-150 - TT47 3/8" Drive; ATD-151 - TT50 3/8" Drive; ATD-152 - TT55 3/8" Drive; ATD-169 - TT60 1/2" Drive