The 91066-1 is an Insertion/Extraction Tool for use with Amp RM and RME ARINC 22 size contacts, has two color-coded halves one is extraction tip and the other is insertion tip. The color of insertion tip half indicates the applicable contact size and the tool number, contact size are stamped opposite the wire slot on the extraction tip half of the tool handle, AMP marking is molded opposite the wire slot on the insertion tip half of the tool handle.