The Discbands Alternate Possession Wristband for Basketball and Lacrosse officials is an easy tool to accurately track alternating possession throughout all levels of amateur basketball and lacrosse. Wear it on your wrist for no-delay reference - white for home, black for visitors. Flip the disc with each possession change. Black silicone elastic wristband. White and black discs (each side also has a different surface and can also be determined by feel). Clip with sizing connectors for one-size-fits-all fit (Up to 8.5" wrist circumference) Each time there is an alternating possession situation, flip the black and white disc by rotating it upon legal throw-in. When the disc has the white side up, it represents the home team. When the black side is up, it represents the visiting team or team with the darker jerseys.