Best Seller | Fulton A-Frame Coupler 2-5/16 in. Diameter 10 000 lbs. Capacity (Bulk 230) The most popular coupler mechanism ever developed the Fas-Lok originated as a Fulton brand and is offered in a full line of SAE Class I through IV rated straight tongue stamped couplers. The Fas-Lok latching mechanism allows quick and easy trailer... more | | $50.00 FREE shipping go to store |