These "Leading Edges" are machined to a very sharp cutting edge from high quality tool steel bar stock that is quenched and tempered for strength and durability. They are available with either a serrated or straight cutting edge, and in 1/2", 5/8", 3/4" and 1" thickness. Do not confuse these high quality leading edges with the blunt edged, sand-cast units that are on the market. We are offering both styles of leading edges as replacement parts; and the serrated edge can be factory installed on anew plow blade for as little as $43.95. Both styles are of the "weld-on" type and require fitting and welding with either a MIG or SHAW (stick) welding machine.