This is an 12-pack of 1 inch (outside diameter) antique brass grommets with matching washers. Grommets are commonly used in canvas work, leather work and other cloth-related work, but they also make great decorative hole inserts for various craft projects including cigar box guitars! These grommets are intended to be used with hand tools, if you are using them for cloth/leather work. They are not self-piercing. Please note that we do not sell the tools necessary to mount these grommets in fabric.