Hardened steel guide rod helps prevent spring bind; durable, black finish resists corrosion. Wolff guide rod and recoil springs must be used together.
SPECS:
Guide Rod - Steel, black finish. Hardened to Rc 55. 4" XD fits 9mm, .40 S&W, and .357 Sig. 5" XD fits .45 ACP only.
Catalog page 204