Spade Anchor-A40-Aluminum Spade Anchor keeps on holding, regardless of the shift in direction of either the wind or the current. It corkscrews itself deeper to hold tighter. Once set, Spade Anchor gives the maximum holding power without dragging. The Spade Anchor offers constant, and maximum, resistance to dragging, even under extreme load. (Independently tested- Top for Performance UK: Sailing Today- March 2015) Spade Anchor digs in rapidly, regardless of the type of sea bottom. In sand it holds amazing, throw it in weeds there is no difference, Sand, Mud, Clay, Gravel, Cobbles, Shingle, Pebbles, Stones ,Rock, Rocky, Chalk, Shells, Weed, Kelp, Spade Anchor holds in all conditions. For boats up to 21 feet, weighing less than 2.200 lbs. Anchor Weight: 6 lbs