If you get a new vehicle or trailer and need to replace the adjustable shank in your Rapid Hitch ball mount system with a 10" drop shank, this is the product for you. Compatible with AM3300 and AM3400 series models. Specs: Fits: 2" x 2" trailer hitch receivers Maximum rise: 11" Maximum drop: 10" Capacity: 10,000 lbs 3442 Andersen 10" Drop/Rise Adjustment Rack Only