Milling Machine Lockdown Vise - 360 Degree Swiveling Base - Hardened Metal - CNC Vise - Install Bolt Included. Blue (4in) Premium quality swiveling Milling Vises features perfectly aligned precision gowned jaws Acme screws and easy to read 0-360deg scales Made from the highest quality ductile Iron 80000 PSI for minimum bending HFS (Tm) Brand, Only Designed so horizontal force pushed the jaws downward, keeping your piece in the right spot