All comb knives are identical in terms of operation. The so-called blade is hidden, so they are compact and easy to carry around without risking to break the teeth. In terms of design, there are more types out there. The most common options include pocket knife designs. Most of them come with spring assisted mechanisms. You can press a button and the comb comes out. It is the faster option – more convenient for hairdressers and barbers.
On the other hand, you can also find classic folding knives – most of them running with springs too. While not as popular, the butterfly comb knife is worth some attention too. It is more difficult to close and open, but it makes a good choice. Choosing the best comb knife based on its design is a matter of personal preferences only.