A clip comprises a body 500 having a longitudinal axis 520 and having a tubular sidewall 511 integrally attached at a perimeter of the body. The body 500 has a slot 501 extending parallel to the longitudinal axis 520. The slot 501 penetrates the tubular sidewall 504 and extends part way through the body 500. The body 500 has first and second longitudinal tubular gripping surfaces 503 and 504 within the slot 501. The second longitudinal tubular gripping surface 504 has an inner diameter that is different from an inner diameter of the first longitudinal tubular gripping surface 503. The slot 501 extends through each of the first and second longitudinal tubular gripping surfaces 503, 504. The body has first and second end surfaces 510, 511. The first end surface 510 is perpendicular to the longitudinal axis 520, and the second end surface 511 is oriented at an oblique angle relative to the longitudinal axis 520.
