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. Lightning-fast removal of the drill core: By pressing the push button on the Drill & Drop hole adapter once, the drill core can be removed 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 slide the hole adapter back forward until it locks in 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 pushed onto the hex shank from the back, serves to center it. The enlargement is then done by sliding on the larger hole adapter above it.