Great Value Grommet Kit: You will get 50 sets silvery grommets with storage box, great for your daily useBox size: 17.5 * 10.7 * 2.6cmLarge Size: These grommets eyelet measures approx. 0.78 inch in inside diameter, 1.25 inches in outside diameter, which is great for curtain, leather, tents, awnings, canvas, tarps, bags and other cloth-made itemsWell Organized: These grommets are well packed with a plastic clear box, good for storing small grommet tool, easy to fetch and apply when you sewingWide Uses: This grommet tool kit is good for repairing canvas, tarps, tents and pool coverings, good for shoes/shoelaces, clothing, crafts projects, etc. (Warm tips: please keep it from the rain, acid rain will make it rust)Easy Installation --- The installation is so easy. Step1: Tap the punch with a hammer to punch a hole. Step 2: Put an eyelet through the hole of front of the object, and put the washer on the back of eyelet. Step3: Face the eyelet to the base and put it on the base. Step 4: Put the install rod on washer, then hammer the eyelet and washer together.