Vanguard VEO TSA DLX L - Large-Sized Deluxe Tripod Support ArmThe VEO TSA DLX L is a high quality, CNC machined Tripod Support Arm that allows you to attach a range of accessories to your tripod to enhance your final shot. To attach to your tripod canopy, you have a choice of a 1 4" thread or 3 8" thread. It also includes the option to have the bayonet fittings out for maximum stability (on tripods that include that feature, such as the VEO 3T or VEO 3T+), or a smooth edge for tripods that don't. To attach to