A 1500 pound pull Magnet. The ones i have are about 4 inches in dia. The attachment loop is on one side of the magnet in the center. Now what i do is take a 20 ounce plastic coke bottle and zip tie it to the Magnet loop. Then i adjustr the amount of water in the bottle so when i bump my rope it walks down river about 1 to 2 feet staying flat tol the bottom I can drop my magnet straight down and walk it down rivers It really works great if i cAN GET TO MY BARN I WILL take pictures of…