In any kind of business organization, there are chances to open a lot of letters at once. If you are wondering how the manual letter opener work though, it is fairly simple. The hook stainless steel letter opener is shaped a lot like daggers and all you do is insert them underneath the corner of the fold side of the envelope. Simply apply pressure in an upwards motion, so that you can successfully slice through the folded edge of the letter and in that way open the letter clearly. Most of the letter openers that you get today, do the same thing as it has been proven that this is the most effective way to handle this type of operation.