modifications needed
I'm not very happy with these. First off, they are, for obvious reasons, one solid piece of metal so they are not adjustable and the strap that is comes loose quickly. Secondly, being one piece of metal, this device WILL cut into the back of your hand. And finally, the most simple thing to fix, these are not sharp enough to actually secure yourself to a tree. I have the foot spikes with these and ill just burst your bubble now that these things aren't going to work unless you make major modifications to this stuff.

A must have
These claws are a must have for any ninja fan. Back then ninja's use to use them to climb up trees and rocky walls to complete there missions. They are also referred to as bear claws. They also were used for selfdefense they use to claw and cut there opponents if they didn't have a weapon at hand. some of the most skilled ninja's use to be able to catch a striking razor sharp sword in there hand's thanks to these claws. If your a ninja dont leave home with out them.