A series of short articles, containing nipple suggestions - not fiction, tested on myself.

The most common plastic mini grips are around 1 inch wide, with around 4/5 teeth on each side. Some might be slightly larger, and can have stronger teeth - these are better, more durable.

There are also smaller metal ones, about 1/2 inch wide.

The smaller metal ones can be very intense. This means that they are excellent for improving self-discipline if you work alone.

For example, you might decide to bear them for 30 seconds, gradually working up to 5 or 10 minutes. Experiment at first, but when you know them, choose a time and do it. Do NOT cheat yourself.

I do not recommend pulling the metal claws off - you might damage the skin. (Pulling off is described in another article.