The Steinmagnet SM 400 is specially designed and equipped for tough tasks on construction sites. The handy, powerful, rechargeable vacuum device lays vacuumable stone slabs, concrete elements, stair steps and stoneware pipes up to 400 kg with any lifting device. Various suction plates are available for different applications, which can be switched in the blink of an eye with the quick-change lock built into the SM 400. The rugged housing has an integrated suspension for crane hooks and a quick-change system for the suction plates. The built-in 12 V battery is rechargeable and replaceable and has an automatic power-saving function (lasts for a whole workday). The battery can be replaced without tools in a matter of seconds. The charging status indicator (LED) is built-in to the galvanised housing. The safety features include a flashing light to warn of pressure drop, manometer, automatic re-pumping in case of pressure drop, large dirt filter, large vacuum reservoir and a unidirectional valve. The SM 400 comes standard with two vacuum pumps. Only one pump has to be in operation for vacuumable materials, which saves power. The turbo switch can turn on the second pump for slightly porous materials or for especially fast vacuum creation.