Metal grommets are lightweight and best used for decoration, not withstanding strong pulls. This grommet kit is suitable for rougher applications (such as leather, canvas, shoes, elastic bands, hanging crafts, tents, and tarps), not for more delicate applications (such as lace-front shirts, t-shirts, high-cut gloves, furniture covers), and not for very thin or very thick materials. The recommended thickness is 1 mm to 3 mm. The outer diameter of the grommet is 1/2 inch and the inner diameter is 6 mm (about 1/4 inch). Choose the appropriate size according to the product description. Pay attention to the direction of the grommet and the pliers. Incorrect direction will cause damage to the grommet and bend the pliers' handle. The bottom of the grommet features a floral pattern, which is not a defect. Portable and Lightweight Punch Pliers - These manual punch pliers adopt a special lightweight design. Made of carbon steel with a chrome-plated surface. The handle of the punch pliers is plastic-coated, making them comfortable to hold, easy to use, and labor-saving. However, do not tighten too tightly, as the handle will bend. The eyelet kit is suitable for light-duty work, not heavy-duty work. The eyelet tool set includes 200 small 1/4" silver and gold metal eyelets of 6mm (inner hole size), 200 matching silver and gold metal washers, 1 handheld eyelet punch pliers, 1 hole punch, and 1 user manual.