The QEP® 8" Vacuum Pump Suction Cup with Gauge makes heavy lifting easy. This hand held portable suction cup has a holding power of 285 lbs. It can be used to lift large tiles, stone, glass and all types of non-porous building material. To use, pump plunger until red line disappears and suction is engaged. During use, red line should not be not visible. Gauge safety feature indicates insufficient pressure. Release valve is located on opposite end of plunger. Store with protector cover (included) in durable carrying case.