The Knaack 932-2PK Gas Springs are designed to assist in the smooth and controlled opening and piano box lids. These gas springs operate by providing lift support, reducing the effort needed to open heavy lids, and ensuring they remain securely open during use. Each package includes two gas springs, offering balanced support for the lid. Constructed from durable steel with a black fin... https://www.wholetoolbox.com/knaack-932-2pk-storage-box-gas-springs-2