Convenient, pre-punched photo-size covers allow you to quickly create a 4" x 6", bound photo book. Set includes two clear, pre-punched 4" x 6" covers; two black pre-punched 4" x 6" covers, and two black ZipBind spines. Pre-punched covers save time and offer faster, easier binding. Editing is easy with ZipBind spines that snap open and close for quick changes. You can use this ZipBind Pre-Punched Photo Size Cover Set with ZipBind spines or your CombBind machine.