I use a strap on the tree one from bass pro, has 4 hooks. Seemed kind a small at first but haven't been in a tree yet that was too big. Works well and a whole lt easier to install. Packs easy and doesn't have any sharp points. You can slide the hooks around the tree any where you want once it's strapped on. Don't need another but am always tempted to buy one everytime I pass one.
Isn't like the arm/screw in kind that lets you hang the bow for a quick grab, but fast enough if your a stander/watcher, perfect for you.
http://www.basspro.com/API-Outdoors-Treestand-Accessory-Kit/product/10207431/93459