The Clamp Lock with TEK_LOK - Locking, attaches to your belt or 1.5-2.25-inch strap. Once attached to your backpack or belt, you can connect any round or square posts. It has a small adjustable tension locking lever to be used to securely fasten the post into the Clamp Lock. These have right and left options to make it convenient to reach the lever on either side depending how you mount them.