Click the hole adapter onto the centering drill - ready to go: 1. Pressing the button on the adapter unlocks the hole adapter. 2. Push forward and replace. 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 need for 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 push 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: By using the Drill & Drop holder, enlarging a hole by simply adding another hole adapter is very easy. The small hole adapter, which is pushed onto the hex shank from the back, serves for centering. The enlargement is then done with the larger hole adapter that is pushed over it.