Good tool for the yard and pond
The grappling hook is a pretty decent product for the price. I have no clue if would be effective in scaling a wall or whatever it is that Ninja's do, but it does work for latching onto debris in my pond and some pond dredging. I have noticed that other reviewers have found this to be a useful tool in yard work. I suspect that this product may be marketed incorrectly. A real grappling hook such as used by SWAT, etc. can cost over a hundred dollars and there does not seem to be anything in between a professional grappling hook and the Ninja grappling hook. As a niche product, it works pretty well.

Ninja Grappling Hook
This is OK for use in tree cutting although I did bend one of the tines on it. But I wouldn't bet my life on it for rappeling. But for the price it is OK.

Useful Tool
Using it to help remove some tree from between 2 houses.
Throwing the hook into limbs, a friend pulls on the rope, while I cut it.
This way, we can control where it falls.
Might find other uses in the future.

Quickly Received
The product was received VERY quickly, I think it was three days after ordering. It is good quality, and very useful.

it'll do the job
the grappling hook works pretty well but the rope is worthless for climbing. definitely need some true climbing rope to tie on