RV slide outs give you more living area. You can get stabilizing jacks are poles to support the slide out.
They are not a good idea on modern RVs.
Pros:
They give extra support
Good for older RVs
Decreases wobble
Cons:
Waste of time and money because not needed
Not secure
May damage new RVs
Voids motorhome warranty
Need lubrication
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