The Factor 55 high strength stainless steel hitch pins. The locking style provides theft security when locking a ball mount or accessory to your 2 or 2-1/2 inch hitch receiver. Grooved pin head for ease of handling, a 50,000 Plus lb shear strength, and proudly made in the USA. Fits 2 and 2-1/2 inch hitch receivers 303 Plus High Strength Stainless Steel Construction (See above material spec photo) 3-1/8 inch span 5/8 inch diameter 50,000 Plus lb Shear Strength Flush-style hitch pin secures your ball mount or accessory to your 2 or 2-1/2 inch hitch receiver Compatible with late-model Toyota Tundra and Tacoma 2 inch factory hitches Grooved pinhead is easy to grab Locking Pin features o-ring to protect internal components from dirt and grime Integral weather-resistant tethered dust cap to keep water and debris out of keyways Uses key to rotate lock in place- PLEASE NOTE- Sufficient hand clearance needed to rotate key 2 Keys included Made In The USA