• One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. • Drop-forged Chrome Vanadium steel sockets with S2 steel TRX-Star* bits. • Sockets heat treated and chrome plated for resistance to corrosion. • Dual satin/chrome finish with knurled ring to assist gripping with oily fingers. • Supplied on socket rail. • Contents: TRX-Star*; T20, T25, T27, T30, T40, T45, T50, T55, T60, T70. • Lifetime guarantee*.