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