Features and Benefits:�Easy to use: The connection adapter's sliding sleeves offer twist and lock security�Efficiency: Save time and money by leveraging your shorter, less expensive bits and rotary hammer�Maximum energy transfer: Maintain drilling productivity, even at 82-1/2"�Versatility: System is compatible with any rotary hammer for drilling in tight spaces82-1/2 in. SDS-Max extension to be used with the Max-Lok™ system.