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 T7, T8, T10, T15, T20, T25, T27, T30, T40, T45, T50, T55 and T60 Tamper-Proof Torx sockets13 Piece Tamper-Proof Torx Set (1/4, 3/8 and 1/2 Drive) includes: T7, T8, T10, T15, T20, T25, T27, T30, T40, T45, T50, T55 and T60 Tamper-Proof Torx sockets packaged on a clip rail
