Quantity: Eyelet Tool Set Includes Hole Punch, Matching Chuck And 100 Sets Of Eyelets (Each Set Includes 1 Eyelet And 1 Washer) And Storage BoxWide Use: These Durable Tarp Eyelets Are Suitable To Denim, Canvas, Tarpaulin, Tents, Awnings And Other Fabric Items Or Other Materials With A Thickness Of Less Than 1MmEasy To Use: The Grommet Kit Eyelet For Easy Installation. First Use The Punch Tool To Punch A Hole In The Tarpaulin (Fabric), Then Take The Grommet Set And Finally Secure The Grommet Set With The Attached Tool. Please Put A Rubber Pad Or Wooden Board When Punching Holes To Prevent The Hole Punch From Dulling.High Quality: Made Of High Quality Cupronickel And Electroplated Surface, With Very Good Corrosion Resistance And Shiny Appearance, Not Easy To Rust.Size: Inner Diameter: 12Mm (1/2 Inch) And Outer Diameter: 21Mm (5/6 Inch). With A Plastic Storage Box, Approx. 6.9 X 3.9 X 1.3 Inch / 14 X 8 X 3.3Cm