Buckleguy Grommet (100 sets per bag) Style #: GM Finish: Antique Brass Sizes: #0000 - 1/8" (3.18mm) #00 - 3/16" (4.75mm) #0 - 1/4" (6.35mm) #1 - 5/16" (7.9mm) #2 - 3/8" (9.5mm) #4 - 1/2" (12.7mm) Outside Width: 1/8" = 5/16" (8.0mm) 3/16" = 7/16" (11mm) 1/4" = 17/32" (13.5mm) 5/16" = 11/16" (17.9mm) 3/8" = 13/16" (20.6mm) 1/2" = 11/16" (27.0mm) Post Length: 1/8" = 1/8" (3.18mm) 3/16" = 5/32" (4mm) 1/4" = 3/16" (4.75mm) 5/16" = 7/32" (5.55mm) 3/8" = 7/32" (5.55mm) 1/2" = 3/16" (4.94mm) Material: Solid Brass-LL LL = Low Lead Brass under 90ppm Meets California PROP 65 and European REACH Standards Tools: To Set, Use Grommet Setter: BG Grommet Setter, Stick & Base BG Grommet Setter, Screw in die setter To punch hole in your material, use one of the following hole punches: Hole Punch Option #2 Hole Punch Option #3 - screw in hole punch