I recently realized that many people are unaware of seam rippers. You can buy one for under 5 bucks. Use it to remove an old hem before sewing a new one, removing scratchy labels, dis-assembling thrift shop clothing to re-purpose the fabric, opening a seam to tailor clothing. Easier and faster than nail scissors. I don’t sew a lot, but I use a seam ripper pretty often.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.