Bicycle pedals are one of the most commonly replaced items on a bicycle. They take a lot of abuse as all of our weight is often on them. Another reason they are so often replaced is many department store bikes come with very low quality pedals that fail with relatively little use.
I am partial to aluminum pedals that have a one piece body and cage. The weak link in many pedals is where the cage mounts to the body. If the screws or rivets loosen the pedal often will break. This design makes the cage and body one piece and very durable.
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Do Not Readjust the Pedals
Usually when you first get pedals with a one piece body the factory will have adjusted the bearing so they are gritty and do not spin loosely. Within the first 50 miles the pedal bearings will loosen up significantly. If you adjust them before installation so they are smooth after about 50 miles they will become sloppy and need to be readjusted.