SPM magnetic clamping blocks have 4 clamping sides and can be switched via the front panel rotary knob. They can be used for surface grinding, angle-grinding, coordinate grinding, eroding, measuring, etc.  Because of the fine 2+2 mm pole pitch (0.5 mm) thinnest parts can securely be clamped. On the back there are four M5 threaded for mounting stops. The low magnetic field height of only 2mm and the complete hermetic seal to recommend SPM clamping blocks especially for use in wire and die-sinking EDM. SPM clamping blocks are also available in stainless chrome steel design.