Italifters ES1 Screw Extractor for Manhole Cover Lifters

The Italifters ES1 Screw Extractor is a safety aid that avoids dangerous hammering when unlocking lids or manhole covers blocked by inactivity, rust, scale or deformation. Hammering is an operation that can be dangerous with the risk of splinters projection, sparks, dangers associated with lifting covers of gas and petrochemical fluids, and also for the risk of breakage of fragile cast iron covers. This accessory must be used in conjunction with an appropriate Italifters clamp that will be inserted into the catch latch and locked on the adjustable drag of the extractor. Then the clock wise rotation of the screw exerts a great upstream force that will easily break the incrustations and allow the initial opening of the first millimetres of the lid which can then be lifted with a regular Manhole Cover Lifter. The lifting screw is rotated by inserting a screwdriver or a lever into the upper ring, the fulcrum that will be placed immediately on the outside of the frame and above the small metal plate that will offer a solid foundation to prevents possible sunken on asphalt of the screw foot. 
Use with Italifters mechanical hooks.