Q&A for How to Open a Door With a Knife

You may need to scrap the old hardware. Use an ordinary twist drill bit, sometimes called a high speed steel bit (the most commonly encountered kind of bit) that is large enough (maybe 5/8" or 3/4") to drill out the keyhole circle slowly. You may need a reduced shank bit to fit your drill. Once the inner workings of the locking assembly are exposed, it is a simple matter to throw the latch open with a small screwdriver or any old thin tool that you can slip inside.

You could probably use a scissor blade as a knife, if it is thin enough. A ruler could work in the same way as a credit card. Paper clips are school supplies as well, so yes, you can use school supplies.

Yes, you can use them instead of paperclips, but they are not as strong.

If the kid knows how to, yes. Anyone could do this.