NABLA Evolution is a fastening system designed to ensure simple installation and maintenance. The system has enhanced performed when used on tracks with tight radius curves, and significantly increases the life expectancy of assembly components by maintaining the track gauge.
The system has been largely used in tram applications, for ballasted track or slab track with concrete ties. It offers improved electrical insulation and lateral force absorption. The unique use of glass-reinforced material in the lateral insulator also offers increased mechanical strength.