Permanent magnet chucks are built using high power Ceramic V magnets. Top plates of 3/8" magnetic steel and 3/8" non magnetic stainless steel are furnace brazed, making a solid, one piece construction. They can be drilled to a depth equal to the thickness of the top plate minus 1/8". Drilling or machining can be done between poles or anywhere in the top plate except where the screws secure the plate to the base. There are no magnets in the top plate. Handles on all permanent magnetic chucks are removable.