Weigh Safe Drop Hitch With Built-In Scale 2.5″ Shank With a Weigh Safe Drop Hitch’s built-in scale, measuring your tongue weight is as easy as coupling your trailer to your ball mount. Hook-up your trailer to the Weigh Safe ball mount just as you would any other ball mount, and your trailer’s weight will push down on the hitch ball. Then, an internal hydraulic piston presses down on a reservoir of oil, which then sends a reading the the hitch’s built-in scale. The Weigh Safe gauge accuracy is an impressive 1.25% +/- (50lb +/-) over the full weight range of the scale. Running a Weigh Safe Hitch results in a much safer and enjoyable towing experience – all while reducing wear and damage risk to tires, wheel bearings, suspension components and the drivetrain of both your trailer and tow vehicle. Specifications: 2.5″ Receiver size (shank) Max gross trailer weight (all models): 8000 lbs with 2” ball 18,500 lbs with 2-5/16” ball Max tongue weight (all models): 2200 lbs V5 & J684 certified Drop hitch adjustment: 1″ increments Ball material: S tainless steel Pin: Dual pin with key lock assembly (included) Rise: All hitches may be used in rise position Gain 1 inch (e.g., 4” drops are 5” rises) Total Height: Add 3 inches (e.g., 4” drops measure 7″ from the top of the receiver to the hitch base) Includes: Drawbar Slider with built-in scale 2″ Tow ball (stainless steel) 2-5/16″ Tow ball (stainless steel) Ball retaining pin (1) Lock plate key assembly Dust lock cover Barrel style keys (2) Optional locking hitch pin Part # WS05 (keyed to match locking plate; select models) Features: Premium drop hitch with integrated tongue weight scale 6061 T6 billet aluminum shank and mounting platform provide superior strength and durability Solid block construction provides greater strength than hollow steel competitors Rustproof Lighter than steel Accuracy of 1.25% +/- (50lb +/-) over the full weight range of scale