You could never get away with a regular procedure in a new car requiring you to hit it over and over with a hammer. The knock-off hammer is a delightfully archaic device today, and the principle of knock-offs is an ingenious if crude solution to a particular problem. It’s also typical of old cars and part of why we enjoy them. The crudeness, “involved-ness”, and simplicity of the process is a throwback to when things were different, so that hammers and the knock-offs that get hit with them are symbolic and iconic items of design the likes of which we no longer see.
Here are pictures of some great knock-offs. Valueless bonus points will be arbitrarily awarded for those who guess the cars to which they are attached.