The built-in powerful springs can help you open heavy lids effortlessly. They can hold the lids in an open position and act as a counterweight to the weight of the lid. They are more compact than gas springs, saving space inside. They come in many different sizes, materials, and with adjustable levels of spring tension. They are sometimes called "power assist stays" and "spring loaded lid stays"
S-AT Stay
Lift-Assist Motion
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