Milwaukee Max-Lok 29-1/2 in. SDS-Max Adapter29 1 2 in. SDS Max extension to be used with the Max Lok system. Versatility: system is compatible with any rotary hammer for drilling in tight spaces 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 in. Easy to use: the connection adapter's sliding sleeves offer twist and lock security Includes: (1) 29 1 2 in. Max Lok SDS MAX