This is a convenient lens filter wrench for when a filter attached to a camera or video camera lens becomes stuck and won't come off. You can easily remove the filter by placing the inside of the wrench around the filter and turning it in the same way you would open a jar lid. Available in 4 sizes to accommodate various lens filters: Approximately 37-46mm Approximately 49-58mm Approximately 62-77mm Approximately 82-95mm *Filter size At camera stores, it can take time and money, but with this tool, you can solve the problem immediately, making it recommended for those who want to handle it themselves.