Designed to fit BT8390 rails to BT8380 columns, the BT8380-JPR is a joining plate that allows a rail to be reversed mounted onto a column, ideal for when installation of additional AV accessories require the use of the channels on the rail. Installation is simple using the provided sliding nuts, allowing the mounted rail to be positioned anywhere on the column. The BT8380-JPR can also mount a BT8390 rail in a standard front facing position or can be reversed, depending on the type of install.