According to my experience these Biscuits & Plugs are far from Industrial and Scientific grade.i ordered a pack for my latest wood project, and unfortunately, the quality of the product was appalling. The plugs were brittle and didn`t fit properly into the screw holes, making them useless. In terms of pros, I can say that the packaging was decent, but that's about it. The cons far outweigh any positives, and I would not recommend this product to anyone looking for reliable screw hole plugs for their projects..