Collett Enterprises was started by my wife and I, Bill & Sandy Collett, to manufacture and sell the Watermark sensor puller. My wife and I have been farming for over 25 years and we started using Watermark sensors to schedule our irrigation 3 years ago. I came up with the idea by pulling out my own sensors over the last couple of years. In 2010 I made a crude jack and used a pliers to clamp onto the sensor. In 2011 I used the locking pliers with the extended jaws which helped to hold on better with no damage to the sensor. After talking to our local Natural Resources District, I found out that others were asking if there was a puller available, so now there is. Thank you for looking at our site.