(Stone Manufacturing Company) Minimizes blood loss and risk of hemorrhage through the severed cord. Utilizes twisting action which effectively closes the severed cord. May be used on any age bull but is an especially effective method to use on older heavier bulls(500 to 900 lbs.) where it is important to minimize the risk of blood loss, swelling and infection. Easy to use and faster than many other forms of castration. Reduces risk of post-castration swelling, infection and trauma. Incise scrotum with Newberry Castrating Knife, then use castrating tool with a cordless, variable speed drill. It is essential that only a variable speed drill with a 3/8" chuck be used and that the castrating instrument be tight and secure in the drill chuck. Stainless steel.