Our Crimp Wire Foundation is made from 100% Pure Beeswax. It has 9 Steel Vertical Wires that radiate strength throughout the entire sheet. The Hooks are designed to go under and fit behind the wedge cleat of the frame to hold it securely in place. If you need additional strength you can add cross wires horizontally.Support pins can also be used. Foundation has deep cell walls and strong steel wires. Fresh beeswax absorbs toxins in your hive...it is a good idea to change our your comb every few years to keep your hives healthy. Wired foundation works best on divided bottom bar frames.