Bought a new sofa and thought it came with these installed but it didn't. I used mainly to draw the sectional together, as the furniture is on carpet and i wasn't worried too much about it shifting as it would on a hard floor. It did pull it together closer than not having them installed. Glad i purchased.As far as installation i had a cabinet pull template that i just set up to the edge of the sectional and it worked well, so installation was easy.Overall it was a quality product and installed well.