We did not sell it at home centers, etc., but we only had to buy it online. There are various sizes and it is very useful. This time I used it in prototype, but from now on, a lot? I would like to purchase it.
I want it to be big and I bought it because the price is reasonable. I bought L and R one by one, but when R spreads it has a little stuck but it stretches roughly straight, but the position of the pin got off to a great extent and it was in a state that it could not be used straight without extending. It is a shame, although I say it is cheap and bad.