Although I like this terminal block it could be improved. The screws will break if overtightened. (Luckily I had another block so I used a bolt from this one.) Well the bolts aren't the best and they could have been made stronger. The plastic cover is also good, but not outstanding. If it had a much more secure locking system and could somehow cover the screws better I'd be a lot happier. However, despite these small flaws, I managed to use the block successfully.