48" H Thread Jackhammer/Rock Drill Rod Steel 1" x 4-1/4" Shank. Ingersoll Rand offers a complete line of construction tool steels and accessories for countless applications. Our construction heritage dates back to 1871 with the invention of the world’s first rockdrill. Drawing on our long and successful history in the construction industry, we use top-grade materials to manufacture a line of tough, durable products that are versatile enough to be used in virtually every tool brand. All jackhammer rods are sold as single units (no required box quantities).