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Once a screw does not release by the first try because it is tightened well or rusted, many people start asking themselves: Do I turn it the right way?
Lots of handyman try to figure out the right direction by turning harder and harder in both directions.
broken threat, broken screw head, damaged tool.
The solution: indra, the innovative cranked wrench key.
indra is handled intuitively. The spiral-shaped torsion of its steel body shows the direction of the threat of a regular screw. As a result, the user starts turning the key unconciously to the right direction.
Prof. Wolfgang Schabbach