Brush: Ideal for cutting brushwood, bushes, dense grass. Eapele weeding knife easily cuts small trees, briers, vines and a variety of heavy undergrowth standards. Two Sets of Installation Accessories: Universally compatible with Husqvarna, Stihl, Oregon and Hitachi brush cutter models, which is a straight shaft trimmer with a 25.4mm or 20mm shaft. Premium Material: The brush cutter blades are made of carbide - a metal that is much stronger than steel. This durable metal gives it the hardness necessary to handle any plant that may come its way and give you years and years of service. Grinding Capacity: 10 inch length is the best knife blade for mulching. It is much better than multi-point knife blades. If sharpness decreases, sharpness can be regained by regrinding. Warning: --- To reduce the risk of injury from thrown objects or broken blades, avoid contact with hard objects such as stones, rocks or pieces of metal. Always wear hearing protection, safety glasses and goggles.