Click on the hole and AMMApA adapter for centering drill - ready to start: 1. By pressing the button on the adapter, the hole and AMMApA is unlocked. 2. Push forward and replace the 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 forward until it locks again. 4. The hole can now be drilled at the desired Schr- and AMMApA angle. Enlarging existing hole diameters: Using the Drill & Drop holder makes enlarging a hole by adding another hole and AMMApA very simple. The small hole and AMMApA, which is pushed onto the hex shaft from the back, serves for centering. The enlargement is then done by sliding on the larger hole and AMMApA above it.