As in Ice Hockey, each team attempts to outscore its opponent by shooting the puck (a hard rubber disc) across the ice and into the opposing team's goal while preventing the opposing team from scoring. Six players (including the goalkeeper) from each team are on the ice at one time. Two-blade sledges that allow the puck to pass underneath replace skates, and the players use sticks with a spike-end and a blade-end. Therefore, with a quick flip of the wrist, the players are able to propel themselves using the spikes and then play the puck using the blade-end of the sticks. A player may use two sticks with blades in order to facilitate stick handling and ambidextrous shooting. Sledge Hockey games consist of three 15-minute stop-time periods.