Depending on when you got this, and if it was sold as an 'open box' item, you might want to try and take it back for a refund, or exhange (get a different model if they don't have this one anymore)... You can see on the right side of the cage in that picture, the rectangle holes where the drive rails snap into place when you mount the drives... Typically, the screw holes in cages are the same diameter as the screws, not large gaping holes like this one has.