Bench pressing on a power rack is one of the safest ways to bench, especially if you are training by yourself. Power racks enable you to adjust the height of the j-hooks which will be your start and stop point. Most importantly, a good quality power rack will come with spotter bars. These are used to protect the lifter if they can’t complete a lift. You can adjust these to be slightly below your bottom point of the lift. They won’t impede on your range of motion but will stop you from being crushed by the barbell. This will allow you to push yourself to your limit to squeeze out that extra rep with the confidence that you are completely safe.