Universal Made of case-hardened, drop-forged, high-alloy steel. Will not split or spread (guaranteed for one year). Universal fit on most security cups. 6 point socket for better grip on connector. 2-1/8" long for 3/4" cup. Used on F-type, CF-type, F-terminating coaxial connectors. Mini Security Wrench is 1-1/2" version.