The HME Universal Accessory Bag attaches to all hub-style ground blinds in seconds. The two webbing straps wrap around the cross rails of the hub blind and attach with snaps. The 8x10 inch pleated bag is large enough to hold multiple calls, along with a folding saw, snacks etc. The bag also has a 4 1/2 x 5 inch front zipper pouch which will hold mouth calls, hunting license or other small items. There is also a front mesh pouch for holding slate call, striker, grunt tube, snack or other items. The HME Universal Accessory Bag attaches to all treestand shooting rails and some treestand seat brackets.