An article for engaging a sheathing of a sheathed portion of a tendon has a tubular body having an inner surface and outer surface and a first end and a second end, fins extending radially outwardly from the outer surface, a longitudinal split extending through a wall of the tubular body and extending from the first end to the second end, locking ribs extending radially inwardly from the inner surface of the tubular body, and a collar formed adjacent the second end of said tubular body. Each of the locking ribs extends parallel to the other locking ribs. The locking ribs are equally spaced along the inner surface of the tubular body. Each of the fins extends parallel to the other fins. Each of the fins have a height increasing from the first end to the second end of the tubular body.