The best anchor is one that holds fast in your typical bottom conditions, maintaining its bite as your boat is rocked by waves and wind. Danforth anchors, with their hinged fluke and excellent holding power vs. weight ratio, are best used in the two most common bottom types — sand and mud. Scoop-style anchors also hold well. Plow-shaped or grapnel-style anchors prove superior in rocky conditions. Grassy or clay bottoms? Plow-style Delta anchors set quickly and their singular blade digs deep.