Each aluminum boat anchor is crafted to have a heavy-duty plow shape for a powerful grip and a long-lasting, dependable hold. The spade shape enables these anchors to rapidly dig deep into the sea floor and hold tight, resisting tugging and dragging even under extreme loads. These lightweight anchors work with a variety of floors including sand, mud, and coral. Even when the direction of the wind or current change, Spade aluminum boat anchors hold fast. For ease of use, these lightweight anchors are painted bright yellow, so you can quickly and accurately check to see how well it is dug into the floor. These anchors are also self-launching and self-retrieving. Rest assured your vessel is anchored securely with a Spade aluminum anchor.