Lester's StikTite Antenna Positioning Clamp is designed to fit a 3/4" Tracking and/or Training Collars with a standard antenna. 
The clamp's purpose is to position the antenna by sliding to the location, on the collar, that is preferred by the user. The antenna pops into the clamp, and can be tightened down onto the antenna, with a provided 2mm hex wrench to limit antenna pop-outs, and to keep the antenna from slipping to an undesirable position on the collar.
Lester's StikTite is made in the U.S.A., and has been field tested, for it's durability and performance. Say goodbye to those annoying zip ties, that slow you down getting into the field, and goodbye to inferior designs, that don't work. Lester's StikTite stays, where you put it. and keeps the antenna, where you want it.