EXCEPTIONAL MATERIAL: Our metal grommet kit is made of premium copper, the surface is more shiny. This material also has good rust resistance. Thickened grommet tool and washers are harder and more durable! GROMMET KIT SIZE: Approx 1/2 inch (12 mm) in the inner hole diameter, Approx 4/5 inch (20 mm) in the outer diameter of the flange and Approx 1/4 inch (6 mm) in the barrel length. GROMMET TOOL KIT INCLUDES: 100 sets of grommets (100 grommets and 100 washers), 3 installation tools (punch tool, installation tool and metal base), all tools in a mess-free storage box. EASY TO USE: Secure the grommets in place with the installation tool and metal base, each set of metal grommets and washer fits tightly, not easy to crack or lose. Grommets for Fabric, Metal Eyelets for Fabric. The grommet kit is suitable for tents, tarps, shoes, clothing, curtains, backpacks, leather crafts and DIY, repair and decoration. Product Material: The Premium Copper Metal Grommets Kit! The grommets are also