Grommet Kit: Includes 100pcs grommet grommet kit (with 100 grommets and washer, individually packed in PE bag), punch tool and attached tool , all in a plastic box without damage. Copper grommets: made of quality cupronickel and galvanized on the surface, with very high corrosion resistance and shiny appearance, easy to rust . Easy to install: Complete eyelet punch kit makes installation easier. First use the punch tool to punch a hole in the tarpaulin, then take the eyelet kit, then use the attached tool to secure the eyelet kit well. Wide range of #39;Uses: The grommets kit is suitable for canvas, tarps, tents, curtains, backpacks, leather crafts, repair and decoration. Size: The inner diameter of these grommets in copper is approx. 14mm.