Click the hole adapter onto the centering drill - ready to go: 1. Pressing the button on the adapter releases 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 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 makes it very simple to enlarge a hole by adding another hole adapter. The small hole adapter, which is pushed onto the hex shaft from the back, serves to center it. The enlargement is then achieved by sliding on the larger hole adapter above it.