Drop-forged Chrome Vanadium steel sockets with S2 steel TRX-P* bits. Sockets are hardened and heat treated with a fully polished finish for resistance to corrosion. Knurled ring for extra grip. Supplied on socket rail. Features & Benefits:Drop-forged Chrome Vanadium steel sockets with S2 steel TRX-P* bits.Sockets are hardened and heat treated with a fully polished finish for resistance to corrosion.TRX-P* fixings are now commonplace on modern vehicles and if a TRX-Star* bit is used on a TRX-P* fixing it can result in damage to the fastener and tool.Always ensure the correct bit is used for each application.Note TRX-P* bits do not fit regular TRX-Star* fixings.Knurled ring for extra grip.Sizes: TP15, TP20, TP25, TP27, TP40, TP45, TP50.Supplied on socket rail.Lifetime guarantee*.Model No. AK6222 Specifications: Model No AK6222 Brand: Premier Contents: 3/8"Sq Drive 50mm TRX-P* Socket Bits; TP15, TP20, TP25, TP27, TP40, TP45, TP50 Drive: 3/8"Sq Maximum Lengt