N022653 Hammer Drill Chuck KeyThis part is compatible with the following machines:DW511 Type 3 1/2" VSR Hammer DrillDWD520 Type 1 1/2 Hammer DrillDWD520 Type 2 1/2 Hammer DrillDWD520K Type 1 1/2 Hammer DrillDWD520K Type 2 1/2 Hammer DrillDWD525K Type 1 1/2 Hammer DrillDWD525K Type 2 1/2 Hammer Drill