If your are needing a 1 7/8 inch hitch coupler and it needs to mount on a 2.5 inch frame material this is the coupler for you. Heavy Duty Zinc Plated construction gives this coupler a carrying capacity of 2,000 pounds and rust resistance. Perfect for many small boat or utility trailers. This coupler mounts with 3/8 inch hardware due to several mounting holes. The lever lock design allows the user to lock the latch for protection and safety.