Click the hole adapter onto the centering drill - ready to go: 1. Pressing the button on the adapter unlocks the hole adapter. 2. Slide it forward and replace it. Lightning-fast removal of the drill core: By pressing the push button on the Drill & Drop hole adapter once, the removal of the drill core can be done very quickly and without the use of additional tools. Extreme shrink holes made easy: 1. Release the hole adapter using the button on the adapter and pull it back. 2. Pre-drill the shrink hole with the centering drill. 3. Then slide the hole adapter back forward until it locks into place. 4. The hole can now be drilled in the desired shrink position. Enlarging existing hole diameters: Using the Drill & Drop holder, enlarging a hole by adding another hole adapter is very simple. The small hole adapter, which is slid onto the hexagonal shank from the back, serves for centering. The enlargement is then done by sliding on the larger hole adapter above it.