Initially intended for Rinko (the Japanese system of disassembling bikes for train travel), MKS “EZ Superior” Rinko pedals have two parts. A stub attaches to the crank like a normal pedal. The actual pedal attaches to this with a fitting similar to an air hose. To attach or release the pedal, turn the outer ring and push it toward the crank. The ability to remove the pedals quickly and without tools (or dirty hands) is useful not only when packing bikes for travel. It can be useful when the bike is stored in a narrow space. It also makes it easy to change pedals on your bike. You could commute all week in street shoes on platform pedals, and then swap in a set of clipless pedals for a weekend ride.
The release tension of the US-B Nuevo pedals is set in three steps using a small wrench (supplied), making it easy to match the tension on both sides and on both pedals.