These screws are top-notch for any industrial application .Based on my observations, they are well-made and durable which is exactly what I was looking for in a screw. The packaging was perfect and the screws were easy to access when I needed them. The best thing about these screws was the quantity - 100 screws for the price is hard to beat. The only downside is that they may be a bit pricey compared to other options in the market. In conclusion, they are definitely worth the investment if you are looking for a reliable and strong screw for your industrial and scientific needs..