Click on the hole and AMMApA adapter for centering drill - ready to go: 1. By pressing the button on the adapter, the hole and AMMApA is unlocked. 2. Push forward and replace AMIAoA. Lightning-fast removal of the drill core: By pressing the push button on the Drill & Drop hole and AMMApA holder once, the removal of the S- and AMMApA core can be done very quickly and without the use of additional tools. Extreme Schr- and AMMApA drilling made easy: 1. Release the hole and AMMApA using the button on the adapter and pull back. 2. Pre-drill the Schr- and AMMApA drilling hole with the AMIAoA centering drill. 3. Then push the hole and AMMApA back forward until it locks. 4. The hole can now be drilled in the desired Schr- and AMMApA position. Enlarging existing hole diameters: Using the Drill & Drop holder, enlarging a hole by adding another hole and AMMApA is very simple. The small hole and AMMApA, which is pushed onto the hexagonal shank from the back, serves here for centering. The enlargement is then done by the larger hole and AMMApA that is pushed over it.