Product is poor quality - door spacing is drilled exactly 180mm with m8 bolt width and the product is of so poor quality that it does not mount flush without imperfections.

This is the “best” I could get it and product has no quality to withstand tensile strength required to mount flush and ruined my 500 barn door .

0 stars. Do NOT buy this product and Wayfair returns department had 0 answers for me with quality issues of the product.