C.S. Osborne Set of 12 Nickel Plated Grommets And Spur Washers. Brass material with dull black finish grommets and washers. You will receive 12 grommets and 12 spur washers. Made in USA. Size : 2 Diameter of hole when set : 7/16" Set these grommets with one of the following tools: C.S. Osborne Plain Washer Grommet Setter, C.S. Osborne Grommet Kits or Press-N-Snap Tool. Punch holes before setting grommets with one of the following tools: C.S. Osborne Drive Hole Punch, C.S. Osborne Revolving Hole Punch or Screw Hole Punch.