there are a lot of supply places to buy them. if you don't know how to use them,it is better to buy yourslef a climbing stand. the hooks as they are called,are tricky to learn to use.I used them for over 20 years doing just what you asked. trimming trees for a living. when you ("cut out"
that is what you call it when you fall,it can be deadly.
if you know someone that can teach you,then you might try them.I have used mine only two times to climb when hunting.that should say something about useing them.they work GREAT if you don't<font size=5>FALL</font id=size5>.<img src=icon_smile_dead.gif border=0 align=middle><img src=icon_smile_dead.gif border=0 align=middle><img src=icon_smile_wink.gif border=0 align=middle><img src=icon_smile_blackeye.gif border=0 align=middle><img src=icon_smile_big.gif border=0 align=middle>
I am not a hunter I am a whitetail population reduction specialest
remember keep your back to the sun, your knife sharp, and your powder dry.