Yescom 1000pcs #4 15/32" Grommet Machine Grommets & Washers Nickel Eyelets Banner Tool for Posters Tags Signs Bags Made of Iron with Nickel Finish Hole Size After Setting=15/32"(12mm) Flange Diameter (Top of Grommet)=6/7"(22mm) Under Flange Height=1/4"(6.5mm) Package includes 1000 Grommets and 1000 Washers.