The FCT-1 fiber optic crimping tool is designed to terminate fiber cords with optical connectors, and it is compatible with FC,SC,ST and LC connectors. The FCT-1 fiber optic crimping tool is made of hardened carbon steel with black oxide finish, and it has 7 hexagon crimping holes: 1.07, 1.73, 3.25, 3.48, 3.84, 4.52 and 4.75 millimeters.