RobbJack Corporation has been a premier manufacturer of solid carbide end mills since 1959, continuing a strong tradition of "making short work of metal." All end mills feature RobbJack's latest geometries and innovative coating options, including the high temp alloy "Tuffy" and the high temp alloy and ferrous material "Super Tuffy" options. RobbJack proudly manufactures their entire line in the United States, from their location in Lincoln, CA.