Looks like a specialty anchor designed for fishermen for relatively light duty in lakes or rivers on smaller boats, and also designed to release easily because of the "back out" feature. Not really for big water use, big boats, or overnight security. Might be a good lunch hook though, for limited use. I can imagine some saying that a stern anchor should or could also be a decent smaller heavy duty capable anchor that had a greater range of uses.
Water Spike Anchor, 22'-35'
"Overview of Water Spike Anchor, 22'-35'. (from the West Marine site)
WaterSpike will hold tightly on the lake bottom and release just as easy. The number one anchor used by professional anglers, the WaterSpike is the last anchor you will ever own.
For boats 22-35 feet.
Incredibly light weight. Only 16lbs!
Unmatched holding power in hard or soft bottoms.
Unique Sliding Ring design guarantees release everytime.
Completely collapsible for easy storage.
Used by professional fishermen all over the world."
"Developed and brought to popularity on the most rugged and structurally uneven body of water in all of Minnesota’s Ten Thousand Lakes. Lake Mille Lacs was not only the reason the WaterSpike was created, but it’s also the reason it’s been proven the best anchor in existence. With the flick of your wrist, the WaterSpike will hold tightly on the lake bottom and release just as easy. The number one anchor used by professional anglers, the WaterSpike is the last anchor you will ever own. For boats up to 16 feet. Incredibly light weight. Only 6lbs! Unmatched holding power in hard or soft bottoms. Unique Sliding Ring design guarantees release everytime. Completely collapsible for easy storage. Used by professional fishermen all over the world."
And from the Boating Solutions.com sight regarding the smaller anchor of the two sizes available:
"Developed and brought to popularity on the most rugged and structurally uneven body of water in all of Minnesota’s Ten Thousand Lakes. Lake Mille Lacs was not only the reason the WaterSpike was created, but it’s also the reason it’s been proven the best anchor in existence. With the flick of your wrist, the WaterSpike will hold tightly on the lake bottom and release just as easy. The number one anchor used by professional anglers, the WaterSpike is the last anchor you will ever own. For boats up to 16 feet. Incredibly light weight. Only 6lbs! Unmatched holding power in hard or soft bottoms. Unique Sliding Ring design guarantees release everytime. Completely collapsible for easy storage. Used by professional fishermen all over the world."
Joe. :teeth :thup

Water Spike Anchor, 22'-35'
"Overview of Water Spike Anchor, 22'-35'. (from the West Marine site)
WaterSpike will hold tightly on the lake bottom and release just as easy. The number one anchor used by professional anglers, the WaterSpike is the last anchor you will ever own.
For boats 22-35 feet.
Incredibly light weight. Only 16lbs!
Unmatched holding power in hard or soft bottoms.
Unique Sliding Ring design guarantees release everytime.
Completely collapsible for easy storage.
Used by professional fishermen all over the world."
"Developed and brought to popularity on the most rugged and structurally uneven body of water in all of Minnesota’s Ten Thousand Lakes. Lake Mille Lacs was not only the reason the WaterSpike was created, but it’s also the reason it’s been proven the best anchor in existence. With the flick of your wrist, the WaterSpike will hold tightly on the lake bottom and release just as easy. The number one anchor used by professional anglers, the WaterSpike is the last anchor you will ever own. For boats up to 16 feet. Incredibly light weight. Only 6lbs! Unmatched holding power in hard or soft bottoms. Unique Sliding Ring design guarantees release everytime. Completely collapsible for easy storage. Used by professional fishermen all over the world."
And from the Boating Solutions.com sight regarding the smaller anchor of the two sizes available:
"Developed and brought to popularity on the most rugged and structurally uneven body of water in all of Minnesota’s Ten Thousand Lakes. Lake Mille Lacs was not only the reason the WaterSpike was created, but it’s also the reason it’s been proven the best anchor in existence. With the flick of your wrist, the WaterSpike will hold tightly on the lake bottom and release just as easy. The number one anchor used by professional anglers, the WaterSpike is the last anchor you will ever own. For boats up to 16 feet. Incredibly light weight. Only 6lbs! Unmatched holding power in hard or soft bottoms. Unique Sliding Ring design guarantees release everytime. Completely collapsible for easy storage. Used by professional fishermen all over the world."
Joe. :teeth :thup