Every hitch has two components; a frame and a couplerThe coupler on all hitches are not all the same, but all couplers do the same job. It is the couplers job to keep the trailer coupled to the towing vehicle. We believe simple is safe. The design of our coupler has only 10 components to it, some couplers have over 20 parts to make it operate.Our LokJaw Coupler is second to none that is available in the RV industry today. We started with a clean sheet of paper when we designed this coupler. During the design process we eliminated several parts that needed to be welded. Instead we incorporated these parts in the laser cutting process and was able to form the frame of the coupler and eliminate the welding of parts. Next we wanted to eliminate fixturing which always leaves opportunity for error during the welding process. Instead we designed into the parts a key for each part allowing for every hitch to be self fixturing, thus eliminating the welding fixtures used for the welding process. What this means is that every hitch is exactly the same, as each hitch is self fixturing.Another improvement we made was the means of attaching the coupler to the hitch frame. In our prior design it was necessary to remove 2 pins that was secured by 2 bolts to the coupler. With our new design the new coupler can be removed and reinstalled by the easy removal of 2 keyed pins without the need of any tools. Last but not least this coupler is a 4-way articulating coupler and self centering on the hitch frame. With our design there are only 4 moving parts to lock the coupler to the kingpin of your trailer.When the kingpin makes contact with the jaws they will wrap around the kingpin and closing the jaws around the kingpin allowing the large steel lock block to spring into position between the front of the jaws, thus preventing the jaws opening. The only way for the jaws to open is for the steel locking block to manually be removed from the jaws. This is a sure proof way of locking your trailer and truck together for towing. This locking process is all automatic. Once the jaws are wrapped around the kingpin there is a stainless steel compression spring in the end of the lock block that pushes the lock block into place in the jaws. While this action is automatic, we ALWAYS want you to check to see the locking has taken place.We also have available added security systems. Look at the right side of the coupler frame and you will notice a red LED light. If your hitch is not in the secured position this red light will illuminate warning you that your hitch is not secured to your truck. Also, we can add a second security in that we can activate the trailer brakes and illuminate the light until your hitch is in the secure traveling mode. Once your hitch is secured and safe to travel the light will so out and the trailer brakes will release. With every hitch we also in a padlock for further security.The frame is the second part of a hitch. You will notice our hitch is different than a standard or air suspension hitch in that we have a main beam in which the coupler sits on and it has 2 springs allowing the coupler to tilt side to side. Under the beam are the 4 air cells that allow the coupler to move, absorbing the bump energy from the road. The beam rides up and down on 1 inch shafts located on either side of the frame. The shafts are connected to the frame sides by 1 inch steel pillow blocks. The last part of our hitch frame is the adjustability for desired height. The holes you see in the side of the frame allows the lower cell support to be located in 4 different positions allowing for different ride heights. In the sides of the frame are the legs that mount the hitch to the truck. These legs are welded in place so all you have to do is set the hitch in the rails in your truck in install the 4 locking pins supplied with the hitch and you are ready to travel. Features:4-way movement couplerReplaceable partsAir cell suspensionNo drill simple installationSuitable with most short bed trucksLimited lifetime warrantyPositive 100% safe locking jaws on couplerManufactured to SAE J2638 SpecificationsGreatly reduces chucking in tow vehicleInstalls into standard universal slotted rails (Sold separately)Optional added security system for couplerWe can supply you with a mounting rail kit or an underbody mount adapterSpecifications:GVW Towing 17000 lbs.Pin weight 3600 lbs.