Which type of anger should be used only for small lightweight boats?

The type of anchor that should be used only for small lightweight boats is a lightweight anchor, such as a Danforth or a grapnel anchor. These anchors are designed for easy handling and provide adequate holding power for smaller vessels in calm conditions. However, they may not be suitable for larger boats or harsher environments, where heavier and more robust anchors are required for stability and security. It's essential to match the anchor type to the size and weight of the boat for optimal performance.