The HUOT Toolholder Vise For BT50 Taper 16T927 is a toolholder vise designed for BT50 taper toolholders. It has a clamping range of 0.39" to 1.57" and can hold tool shanks up to 1.57" in diameter. The vise body is made of ductile iron with a black oxide finish. It comes with an M10 mounting stud and nut. The vise can withstand up to 20,000 PSI hydraulic clamping force. This is a high quality toolholder vise for secure holding of BT style toolholders in milling machines.