Review on TUFF Collar Dog Fence Receiver: Durable Replacement Strap for Maximum Performance by Erin Hawkins

I bought two collars for my German Shorthaired Pointer. One weighs 74 pounds and the other weighs 64 pounds. I bought medium collars. We also have an invisible fence on our property. I thought it would be a good replacement for the collars that came with the system. Unfortunately, the holes are too big for the sensor pins and won't fit very well when you reattach them. The center collar was too long and I had to trim off the excess, which was very difficult even with sharp scissors. There were a few others to choose from but this seemed like a good deal. I just have to use waterproof tape to keep the sensor from coming off the collar.