This Mammoth Tripod 75mm to 100mm Half-Ball Adapter from Benro allows 100mm half-ball tripod heads to be used with Benro's Mammoth tripod, for increased support and functionality during video production. Simply line up the locating pin, drop the adapter in to the 75mm receiver and screw it down. It's then possible to insert a compatible 100mm half-ball tripod head base. To remove, simply press the release button and lift up.