Features: Dual magnets provide 120% more power than our standard chuck and positive shut-off for easy workpiece removal. Ceramic magnets are used because they never lose their holding power. Submersible design for use in EDM or other fluids. Maintenance free because chucks are sealed and lubricated. Rigid work surface provided by laminated and brazed top plate. Maximum holding of both small and large parts due to combination fine/standard pole spacing. Low height for more work clearance. Clamps included. Picture Shown: Model No. DMB-510, 10 x 5 x 2-1/2".