These rugged steel rear-mount box blades are ideal for working gravel, topsoil, mulch, manure, and more. Boxed ends help retain product being worked. All box blades are quick-hitch compatible, feature dual, replaceable cutting edges, and our durable, corrosion-resistant powder coat gray finish. Equipped with a fixed front and rear replaceable steel cutting edge. Category I pins are included with purchase. Features 2 replaceable 1/2 in -thick cutting blades and adjustable ripper shanks. This product is rated for tractors up to 40 HP.