I agree with the guys above, use the climbing stix. The other thing is, the last thing you need on a hunting trip, is a gaff hole in your calf. Using spikes take a little practice and you need to over come your natural desire to hug the tree as you go up. You need to keep your butt and upper torso back away from the trunk. That keeps your weight pushing in on the spikes. If the wind blows and rocks the tree, the first thing you'll do is wrap your arms around the tree and hug it. That will make your spikes kick out and you'll wind up sliding down the tree, with gaffs way too close to pumpers. I mean arteries that pump blood fast. Stick with the stix, Joe