Adapter Couplings for Connecting Continuous Rod to Tools AC-1-1 0.375 Set screw type, to 3/8”COARSE RH THREADAC-1-2 0.393 Set screw type, to 3/8” COARSE RH THREADAC-1-3 0.415 Set screw type, to 3/8” COARSE RH THREADAC-1-4 0.461 Set screw type, to 3/8” COARSE RH THREADAC-2-1 0.375 Fine LH thread Hook , to 5/16” COARSE RH THREADAC-2-2 0.393 Fine LH thread Hook , to 5/16” COARSE RH THREADAC-2-3 0.415 Fine LH thread Hook , to 5/16” COARSE RH THREADAC-2-4 0.461 Fine LH thread Hook , to 5/16” COARSE RH THREADAC-3-1 0.375 Set screw type, to 5/16” COARSE RH THREADAC-3-2 0.393 Set screw type, to 5/16” COARSE RH THREADAC-3-3 0.415 Set screw type, to 5/16” COARSE RH THREADAC-3-4 0.461 Set screw type, to 5/16” COARSE RH THREADAC-4-1 0.375 Fine LH thread hook , to 3/8” COARSE RH THREADAC-4-2 0.393 Fine LH thread hook , to 3/8” COARSE RH THREADAC-4-3 0.415 Fine LH thread hook , to 3/8” COARSE RH THREADAC-4-4 0.461 Fine LH thread hook , to 3/8” COARSE RH THREAD