It can be used without problems. The double point hexagon socket set screws are easy to find, because the types are limited. At the time of purchase it was inventory, it arrived at around 2 days after ordering. As a feature of the product, it was a slightly soft material because it is iron dyed black. I think that machines that need this kind of hand have almost the same ones. It is easy to purchase because it sells with a good number. Actually, I use only two, but I think that I will keep the rest as inventory.