Fasnap Self Piercing Grommets and Washers can be set with Fasnap grommet machines as well as the Stimpson 405 and 479 grommet machines. Fasnap Self piercing grommets come in a variety of sizes, #0 1/4", #1 5/16", #2 3/8", #2LN 3/8", and #3 7/16". All sizes are available in Brass or Nickel finish. These self piercing grommets with small gripping teeth washers provide a more secure set and are recommended for projects that require an extra strong hold onto the material.