Set 1:1 for Vacuum cleaner adapter. Set 2:2 for Vacuum cleaner adapter. It allows for one-handed assembly and disassembly, making it for users who frequently change nozzles. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
This product would be ideal for industrial settings where dust collection is required, especially in environments with harsh or abrasive conditions.