Ridgid 31797 1/2-Inch to 2-Inch Ball Bearing Kit with Ratchet Wrench and Case This item is KNOCKOUT, R739BB 1/2-2 W/WR&CS 31797 This product is used for tools-replacement-parts This product manufacture by Japan Model R739BB Precision-ground 3-point punch/die sets H-D ball bearing drive screws Durable ABS storage case Ridgid covers its products with a lifetime warranty against defects in material or workmanship for the life of the tool