Manufactured with premium quality tool grade steel and as two piece construction for even stronger performance Torx fasteners profiles were introduced to improve manufacturing processes Provide maximum engagement to reduce the chance of fastener and tool damage 6181 - TP10 - 1/4 in.;6182 - TP15 - 1/4 in.;6183 - TP20 - 1/4 in.;6184 - TP25 - 1/4 in.;6185 - TP27 - 1/4 in.;6186 - TP30 - 1/4 in.;6187 - TP40 - 3/8 in.;6188 - TP45 - 3/8 in.;6191 - TP50 - 3/8 in.;NOTE: These high quality bit sockets will provide a lifetime of performance when used with hand tools. The warranty is voided if these bit sockets are ever used with impact tools - NO EXCEPTIONS! Determination of damage by impact tools is subject to SPX evaluation and discretion - NO EXCEPTIONS.9 Piece Torx Plus Bit Socket Set Full Specifications Brand OTC Bit Length 1" Size Range2 TP10-TP50 Bit Style Non_Tamper_Proof Bit Type Torx Plus Male Drive Size 1/4" & 3/8" Number of Pieces 9 Retaining Style Quick Change Package Type holder Item Bit Set