The term 'Basketball Net Holder' refers to the RIM of a basketball hoop. The RIM is the metal hoop that the net is attached to, and it is usually 18 inches in diameter. It is held in place by a backboard, which is a flat piece of material that is mounted on a wall or other support structure. The RIM is also connected to a support structure, such as a pole, which holds the entire hoop in place. The RIM is the most important part of the basketball hoop, as it is the target for players to shoot at.