When you want to mount carry something with any really weight on a belt, there are really two things that you need to take into account, the strength and stiffness of the belt, and the weight, and method of use of the item to be carried.
The principle is simple. A clam shell hinged design allows the user to quickly and easily slip the mounting over a belt in place, and closes at the bottom, with first a pair of pinch-to-open horns and then a latch that folds up and around, locking the horns from pinching open, both of which are held against the body when worn, keeping them protected from any conceivable accidental release. Inside the clip there are a run of holes cut into the back face, into which two rubberised spacers which can be placed at a variety of spots in order to give the best hold on the belt, as well as eliminating slippage or wobble.
The business side of the clip however is the the flat faced plate which is dotted with a 3 x 3 grid of holes, through which rivets, screws and bolts can be threaded and fitted to the eyelets fitted to many of the holsters, magazine carriers, phone holsters, knife sheaths and many other types of accessories that you will want to fit to belts and carry around with you. The inside face is recessed so your boltheads don't interfere with the belt, and ensure a safe and secure connection.
With bolts, and rubber spacers you can affix in many different combinations to allow you to set up whatever you are carrying to suit your needs, space and usage you had in mind.
The inner face of the TEK-LOK is slightly curved to marry with the body contours, the width of the top edge of the clip means it offers a stable platform, which as the load increases, becomes more and more important. I set mine up with my HHA ASOT-01 knife as an example and it ran really nicely.
One thing you'll find though is that you are at the mercy of the holster, sheath and carrier manufacturers, as the holes in the item to be mounted will determine how and where you can use the TEK-LOK, so bear that in mind, and if possible, try before you buy to ensure you get a good fit!