50-piece set includes eyelets and plain washers to make 25 complete grommets * Use to reinforce holes & prevent tearing with canvas, vinyl, leather and fabric * Great for tarps, canopies, luggage, upholstery, curtains and boat covers * 1/2" diameter hole when set, 15/16" flange diameter, 1/4" length-under-flange * Also available as kit with hole punch, mandrel and anvil