Product characteristics:Treadmill Allen Wrench Both ends are suitable for different screw heads,with the larger end can be used to adjust the belt tension. Quality Materials : Treadmill Allen Wrench of Quality With Heat-Treated ChromeVanadium Alloy Steel for Lasting Durability Tough Reliable and Safe To Use Not EasyTo Break or Deform. Widely compatible:Treadmill Allen Wrench for the Nordictrack Proform, Welso, Golds Gym, Freemotion, Reebok, Epic, Sears, Lifestyler, Horizon, AFG, Vision, Trimline, Schwinn, Nautilus, Bowflex, Sole, Spirit, LifeFitness and More Treadmill and will adjust the belt on either side of the machine. Product advantages:Build quality is excellent, ensuring durability for multiple uses. It's a must-have tool for any NordicTrack treadmill owner, and the convenience it brings to maintenance is invaluable. Easy to use:Sides are long enough to reach the adjusting screws,Provides Extended Reach And Enhanced Leverage And Torque; Beveled Ends Ensure Easy Insertion.The metal is strong and doesn’t bend/distort under normal torque. Treadmill Allen Wrench for NordicTrack Rear Roller Treadmill Key Replacement.
for NoridicTrack Treadmill Wrench - 1 X TreadLife Fitness Double Sided Allen Wrench.

Treadmill Allen Wrench for the Nordictrack Proform, Welso, Golds Gym, Freemotion, Reebok, Epic, Sears, Lifestyler, Horizon, AFG, Vision, Trimline, Schwinn, Nautilus, Bowflex, Sole, Spirit, LifeFitness and More Treadmill.

Two ends with Two Sizes: 0.23in/0.2in.
This is a direct replacement for the original large hex wrench that came with the treadmill.
Each end fits a different screw head with the larger end can be used to adjust the belt tension.
This tool works for the Nordictrack Treadmill and will adjust the belt on either side of the machine.
Tightening or loosening is easy, that it is fully stretched and aligned without wearing it out.
If you have a NordicTrack treadmill and have lost the original key, this key works well for adjusting the track.