Vacuum Cups - Medium Duty Vacu-LiftVacuum cups powerfully grips and holds material safely Vaccum created by cups allow easy lifting of heavy weights by either one cup or two Ideal for moving heavy gauge metal, marble slabs, plate glass and plastic sheet Extended Vacu Lifters keep operators hands away from dangerous areas, especially used in punch press applications Manufactured of strengthened steel rods and oil resistant rubber cups Positive push button release valve assures instant