Measure truck trailer drums without removing wheels.
  • Unique shape to go around air cans.
  • Electronic Brake Drum Gage
  • 4"-20"/100-500mm capacity
  • 4" drum preset (101.60mm)
  • Floating zero sets zero anywhere
  • Hold function
  • Resolution: 0.0005"/.01mm Dust, water and oil resistant
  • Includes 4" setting master, fitted case