This tool is a must have for sign shops, dress makers, arts and crafts. Our self piercing grommet machine will punch a hole and set the grommets in one press Grommet machine comes with 1 die and 1000 grommets( we have 1/4" #0, 5/16" #1, 3/8" #2, 7/16" #3 dies and grommets in stock, Please tell us which size do you need before shipping).