For secure and quick fastening. The quick-action clamping nut and the BF-AGC clamping flange counterpiece ensure that the tool is secured on the angle grinder. Can be loosened quickly and easily without the need for any tools, ensuring a smooth tool change. Toolless clamping of various discs|Time savings thanks to easy handling. Lockable spindle and quick-release lock nut for fast tool-free disc changes. Time-saving work. Lockable spindle and quick-action clamping nut for fast disc changes without the need for tools. front clamping flange|sanders clamped without using tools. for AGC 18|for disc diameter 115 – 125 mm