Safe-Line Clamp? features a two-piece plug and steel socket that retains up to 90% of the wire rope’s strength. For use on 6 x 19 IWRC or 7 x 19 right regular-lay wire rope. Preserve Rope Strength: Retains up to 90% of rope’s strength Versatile: Use on 6 x 19 IWRC or 7 x 19 right regular-lay wire rope