As a result of using this product from the Industrial and Scientific category, I found that the BrassCraft SC0400 Assorted Handle Screw had low quality. The screws were not durable and had a tendency to break easily... This was frustrating as it required constant replacements. The only pro I can mention is that the assortment of handle screws was decent. However, the poor quality overshadowed any benefits, making this product a disappointment..