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A time saving device for visually checking whether wheel nuts and fish plate bolts are loose.


  • Loose nuts are visible at a glance – read by video on data logger trains
  • Saves on labour
  • Takes seconds to fit
  • Track applications include rail joints, switches and crossings
  • Reduces possession times: overhead structures can be checked without ladders or need to isolate the current in catenary systems
  • In rolling stock applications maintenance and service routines can be speeded up for faster turn around and lower operating costs
  • Improves safety and risk management
  • Range of sizes available

Fact file

  • Millions in use on truck wheels worldwide