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A new training device from the designers of the original commercial KTB. This is a huge improvement over the original, and has been field tested for over a year. It can be locked using various use-once tags or with a brass insert E7 from Burg Wachter. Just like the metal one from years ago, this 3D-printed, strong-flexible plastic version offered here, needs no hinge. This a great advantage since pinching during installation is virtually eliminated. And, of course, the device is completely water / metal detector proof.
Note, the plastic locking pin is shown/printed inside the KTB tube, it is a seperate piece. Due to the nature of 3D printed tolerances, you may find it fits too tightly into the device 'ears'. If this is the case, simply polish the pin using some fine sandpaper.