Patented bit holding system forces bit surface to opposing side for maximum bit retention - strength. Packaged in patented impact resistant slide rail system . Heat treated socket bases for durability and service ability. Chrome sockets; S2 and alloy steel bits. Includes E4, E5, E6, E7, E8, E10, E12, E14, E16, E18, E20, E22 and E24 Torx Sockets 13 Piece External Torx Set (1/4, 3/8 and 1/2 Dr.) includes: E4, E5, E6, E7, E8, E10, E12, E14, E16, E18, E20, E22 and E24 Torx Sockets packaged on a clip rail
