Standtastic is the brand of keyboard stands Yamaha USA used to sell. I tried these several years ago, although the pictures look just like the same stand. I objected to how wobbly the keyboard was when placed on the stand. There was too much shake when I played the keyboard and it was too easy to hold the keyboard and make it wobble left to right. Yamaha has stopped distributing these stands.
George Kaye
Kaye's Music Scene
Reseda, California