https://www.amazon.com/Gardner-Bender-45-824UVB-Management-Industrial/dp/B00FYTX8A6/ref=mp_s_a_1_1?ie=UTF8&qid=1539293430&sr=8-1&pi=AC_SX236_SY340_QL65&keywords=gardner+bender+flex+strap&dpPl=1&dpID=41Xf6CA0sLL&ref=plSrch&th=1&psc=1
So this is what they are. I bought them on clearance at Walmart for like $2. What I like is that they are a little stretchy so I can pull them tight and know stuff isn't moving. Also, I cut a bunch of them in half and they still work. With the arrow shaped they can be a little difficult to undo but I twist them a little and it's much easier.
I used these to hold fencing to u poles and 2 years later none have broken.
Those are freaking awesome!
Reusable makes them a great bargain.
I will have to be sure to get some before gardening season......they would work great for my temporary fences.