Set of 17 different adaptors for use with 1/4″, 3/8″, 1/2″ and 3/4″ drive sockets. 3/4″F:1″M, 1/2″F:3/4″M, 3/8″F:1/2″M, 1/4″F:3/8″M, 3/4″F:1/2″M, 1/2″F:3/8″M, 3/8″F:1/4″M, 1/4″ and 3/8″ drive for 1/4″ hex bits, 1/4″ and 3/8″ drive male adaptors, 50 and 70mm magnetic bit holders, 50mm QR chuck bit holder.