The Factor 55 Locking Hitch Pin fits 2" and 2.5" hitch receivers and is made in the USA from high-strength 303+ stainless steel with a grooved head, the 5/8"-diameter pin (with a 3-1/8" span) has 50,000+ lb. shear strength for maximum durability. This locking hitch pin provides security when locking a ball mount or accessory and uses a key to rotate lock into place. Features a weather-resistant tethered dust cap keeps water and debris out of keyway and o-rings to protect internal components from dirt and grime.