The Lifetime® 71566 Shatter Guard XL portable basketball system includes a Shatter Guard backboard that integrates a clear playing surface with a sturdy steel frame for superior strength and a pro-glass look. The Slam-It® Rim features double-compression springs for spring-back action. spring-back action. No tools are required for height adjustment. The Power Lift offers instant and effortless height adjustment from 7.5 to 10 feet.