Sealey trx p socket bit sets sealey premier ak6223 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