THE WIDE HORIZONTAL STANCHION BASE COMMONLY USED WITH THE ALUMINUM TUBE PROFILE TO CREATE AN ADDITIONAL AXIS. THE TUBE EXTENDS PARALLEL FROM BOTH SIDES OF THE MOUNTED BASE. IT IS A WIDER OPTION, MAKING IT STURDY AND DURABLE. CLAMP SCREWS ARE INCLUDED. THE SUGGESTED HARDWARE TO MOUNT THE BASE TO A T-SLOT CAN BE FOUND ON THE "SUGGESTED HARDWARE" TAB.,