First Teams Block-Aid rebounder training aid requires no tools or ladders to install. Simply toss it into place or lift up with a broom handle. Tip out to remove or use broom handle to remove. The Block-Aid is molded of lightweight urethane and will not damage floors or injure players. Get the most out of your practice sessions. Block-Aid will improve rebounding skills without wasting precious time on made shots. Ball rebounds off naturally in all directions.