I grab these from the dollar store but I think I've seen similar online. I originally used them because I grow in fabric pots and was difficult to do any LST and provide support later in the cycle. Been using them for a couple of years and happy with them. The two "legs" slide right down the edge of the pot, I'll use 2 per pot on average but have used 3 or 4 on large plants. I wait for about 1/2 way through stretch and weave the larger colas through.