Sealoc calibrated turnbuckles allow you to set rig tension precisely and with repeatability using an easy-to-read scale on the side of the turnbuckle barrel. Instead of turning a stud or turnbuckle body between two ends, you make a single adjustment on a coupling nut, which allows finer adjustment and more tension on the wire than with a normal turnbuckle. Integral toggle prevents off-axis loads on either wire or turnbuckle body. Bronze coupling nut eliminates galling, Sealoc calibrated turnbuckles allow you to set rig tension precisely and with repeatability using an easy-to-read scale on the side of the turnbuckle barrel. Instead of turning a stud or turnbuckle body between two ends, you make a single adjustment on a coupling nut, which allows finer adjustment and more tension on the wire than with a normal turnbuckle.