[Material] Made from 45# Steel, nickel-plated for high hardness and durable use.[Size] grommet setter for grommets of 3mm inner diameter.[Feature]Portable size, lightweight, comfortable to grip, and easy to use.[Practical]It is an essential tool for dressmakers, artists, sign shops, and clothes manufacturers, etc.[Application]Perfect grommet punch or rivet setter tool for making, repairing leather craft, clothing, handbags, curtain, etc.