N022653 Hammer Drill Chuck Key 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 Size: Measures approximately 4.25 X 1.55 X 0.65 inches Package Include: 2 X Drill Chuck Key