They work by putting your feet in at an angle (toes towards the frame first) and then straightening you foot. The straightening causes the strap which is at an angle across the pedal to tighten and hold you foot in securely. I used to use them but clip in pedals are easier and safer to use. You do have to remember to turn your ankle outwards when you remove your foot similar to clip in pedals. If you don't do that your foot is not going to come out. Clip ins are just simpler and easier to use. Now days low end clip in pedals cost the same as what you will pay for your set up especially when they clip ins are on sale. Roger