Don't exceed working load limit.Up-right lifting would be applicable by one hand operation if spring will be off.
Drum Lifter has same application as crane,electric hoist and chain hoist.
Drum Lifter has various application for lifting if large and small steel drum without lid, or even for liquid or solid , the different shaped or transformed steel boxes.
As general usages, there is an example to use steel drum to cut half or adequated size to use.
In such case of no edge (portion of drum) appearing on grip section, there is risk for GRABS to slip or come off. But in this case,grips edges would be welded or bolted reinforcements as shown right.