Safety First Extend to Fit baby gate. Push button release to slide open and can swing open also 180 degrees. We used for 6 months inside home. Very minimal use. All hardware is included, functionality works perfectly and they have no paint chips or wear - look basically brand new....even still have the original boxes.
We have 2 of these available. Here is exact links to the product. Babies r Us = $80, Walmart = $60
https://www.walmart.ca/en/ip/safety-1st-extend-to-fit-sliding-metal-gate-white/6000203611478
https://www.babiesrus.ca/en/Safety-1st-Extend-to-Fit-Sliding-Metal-Gate---White/6472B8C4.html
Will sell individually for $35 or both for $60.