30 piece 3/8? drive bit socket set consisting of 28 TX, TPX and TX-E socket bits for internal and external heads plus 3/8?-1/4? adaptor, 3/8? drive 3? extension bar. Accessories 3/8″ drive 3″ extension, 3/8″ F: 1/4″ M adaptor TX Bit sockets 3/8″ drive TX10, 15, 20, 25, 27, 30, 40, 45 & 50, TPX Bit Sockets 3/8″ drive TPX10, 15, 20, 25, 27, 30, 40, 45 & 50, TX-E Sockets 1/4″ drive E4, E5, E6, E7 & E8. 3/8″ drive E10, E12, E14, E16 & E18.