Pros: Sockets feel solid Negatives: No instructions. I used a hammer and a vise to press the studs into the brackets before mounting them on the trailer. I started with a 20 ton press but the hammer worked fine. I also used a hammer to slide them into the trailer mounts. The screws aren't grade marked so I'm guessing they're not even grade 5. The two screws I used to replace the stripped screws were grade 5. I also added washers to ensure proper alignment. since the screws are a bit long for my application on springs. Overall they do the job but I'm disappointed with the quality of the screws.