We are not shipping limited quantities of the 42" shredder blade kits. These blades will work on the Walker Mower™ older MDGHS42, the current DC42, and DC42r mower decks. The reversible design will allow blades to be reversed to renew the curring edges. The hardened blades stay sharp for extended periods of time before resharpening is required. Install without modification to the mowing deck. Order yours today!