I have a 5 pound Danforth high-tensile steel anchor that's at least 30 years old. (Bought it from Defender when they were in New Rochelle NY)
Today I might get a small Fortress anchor if I needed to replace it, but steel is cheaper and there are advantages to not leaving anything too nice in the bottom of a dinghy. The Danforth style anchors hold well and lay flat which is an advantage on the dinghy floor.