STOP Scissor Jack Loosening!


Most scissor jacks don’t always stay tight after they are first set. They can loosen up and may need to be re-tightened.

  1. Older Jacks that have been cranked with road grime and dirt on the jack screw wears the nut threads down.
  2. New Jacks may be lubricated to turn smoothly – that can also cause the threads to slip and also collect dirt and grime.
  3. Normal moving around inside the trailer, especially towards the rear, will transmit pulses onto the jacks and provoke loosening.
  4. Wind can loosen the jacks by trying to rock the trailer.

Blocks under the Jack to reduce sideways wobble, puts a higher strain on the screw, which can induce loosening. The harder it’s cranked, the more strain on the screw; the easier it can slip.


The “Nut Lock” will prevent these problems.

And one more problem … Sometimes the Jack screw can begin to unwind as soon as you pull the crank off. This is when the Sizzer Jack Nut Lock “Key” can help. Here’s how…

The Sizzer Jack Nut Lock is designed for use with typical jacks that have a 3/4″ (19 mm) hex crank nut.

I hope you give them a try and let me know how they work for you.— Charles Gretz, Inventor

If, for any reason you are not completely satisfied, simply return the Nut Locks and keep the free gift as a “thanks for trying”. They’re guaranteed to please, or money back!

Scissor jack
Jack not included.

• Made of sturdy aluminum plate
• These clips will never rust 
• Easily installed by inserting the locking blade into the jack frame and over the crank nut. DONE!


** Note – The Nut Lock may not work on jacks where the crank nut extends out from the jack frame.



UPC 860001343908

Your FREE Gift just for trying the Sizzer Jack Nut Lock®

  • Ultra Bright Mini LED Tactical Flashlight (a $10 Value)
  • CREE XPE Q5 LED Element Max 300 Lumens 100k hours
  • 3 Modes – High / Low / Strobe
  • Adjustable Zoom Focus for Long Distance Illumination
  • Waterproof, Crush Proof Aluminum Alloy Casing
  • A must have item for Home, RV, All Utility
  • Requires one AA Battery (not included)