F; eatures: Extra long 4" shank; Bits are made from S2 steel to meet or exceed torque specifications; Sockets are made from heat treated chrome vanadium steel for strength & durability; Custom blow molded case included.; ATD carries a complete line of bit sockets available individually.; These high quality triple square spline bit sockets are designed to be used with hand tools only. The bit socket warranty is voided if they are used with any type of impact tools.; Set Includes: (10) Extra Long Triple Square Spline Bit Sockets: M4 1/4" Drive - ATD-243; M5 1/4" Drive - ATD-244; M6 1/4" Drive - ATD-245; M8 3/8" Drive - ATD-246; M9 3/8" Drive - ATD-247; M10 3/8" Drive - ATD-248; M12 3/8" Drive - ATD-249; M14 3/8" Drive Tamper-Resistant - ATD-252; M16 1/2" Drive Tamper-Resistant - ATD-253; M18 1/2" Drive Tamper-Resistant - ATD-254