The most popular star bit sockets for general use; Includes 6-lobe standard, 6-lobe tamper-resistant, and external star bit sockets; Bits are made from S2 steel to meet or exceed torque specifications; Sockets are made from heat treated chrome vanadium steel for strength & durability; These high quality star bit sockets are designed to be used with hand tools only. The bit socket warranty is voided if the are used with any type of impact tools.; ATD carries a complete line of bit sockets available individually.; Set Includes: (13) 6-Lobe Star Bit Sockets: ATD-126 - T8 1/4" Drive; ATD-127 - T10 1/4" Drive; ATD-128 - T15 1/4" Drive; ATD-129 - T20 1/4" Drive; ATD-130 - T25 1/4" Drive; ATD-131 - T27 1/4" Drive; ATD-132 - T30 1/4" Drive; ATD-135 - T47 3/8" Drive; ATD-138 - T60 1/2" Drive; ATD-124563 - T40 3/8" Drive; ATD-124564 - T45 3/8" Drive; ATD-124565 - T50 3/8" Drive; ATD-124566 - T55 3/8" Drive; (12) Tamper-Resistant 6-Lobe Star Bit Sockets: ATD-139 - TT7 1/4" Drive; ATD-140 - TT8 1/4" Drive; ATD-141 - TT9 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-147 - TT30 1/4" Drive; ATD-148 - TT40 3/8" Drive; ATD-149 - TT45 3/8" Drive; ATD-151 - TT50 3/8" Drive; ATD-152 - TT55 3/8" Drive; (10) Standard External Star Sockets: ATD-153 - E4 1/4" Drive; ATD-154 - E5 1/4" Drive; ATD-155 - E6 1/4" Drive; ATD-156 - E7 1/4" Drive; ATD-157 - E8 1/4" Drive; ATD-158 - E10 3/8" Drive; ATD-159 - E12 3/8" Drive; ATD-160 - E14 3/8" Drive; ATD-161 - E16 3/8" Drive; ATD-162 - E18 1/2" Drive