After i put it to the test, I must say that these screws really live up to their name. As an industrial worker, I need something strong and sturdy which won`t break easily during rigorous work and these have ticked all the boxes .The screws fit perfectly and haven't hurt my fingers, which is a huge plus. The only downside was the slightly higher price, but the quality justifies it. Overall, a great buy for anyone looking for reliable industrial and scientific hardware..See full review