AS a loyal customer in Industrial and Scientific field, I purchased this product to hold small items in place during my work .As a result of my tests, I determined that the quality of this product is very poor. The metal is weak and will not lock into place, making it unusable. The design is also awkward, making it difficult to operate. the only pro is the size, but that`s not enough to justify the price. I wouldn't recommend this product to anyone..See full review