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. This product is certified MADE IN THE USA by Dutton-Lainson, a leader in the industry.