Intended use - metal buttonholes are light, more used for decoration, and cannot withstand heavy pulling. This grommet kit is very suitable for materials with a thickness of 1-3mm, such as leather, tarpaulins, shoes, elastic bands, paper cards and hanging handicrafts. Not suitable for fabric or cloth. Portable and hand-held punch pliers - These hand-held punch pliers have a special design and are made of metal, which is comfortable to hold, easy to use and effortless. But please don't push too hard, the handle will bend. The grommet kit is light and not suitable for heavy duty. Colour:As Shown Material:Metal Package Contents: 1 * Metal clamp 100 * half-color hollow buckle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.