We are offering a high-grade Rockbit Tool Steel Ball that is used for making equipment that is used in oil fields and during offshore drilling operations. They do a good job of withstanding abrasion from mud slurries and pulverized rock. These are made to perform well in the extreme conditions that are frequently present when drilling a deep hole in the earth. Rockbit Tool Steel Balls offer the durability and strength needed to endure intense pressure and the abrasion of crushed rock.