Lucky line's Brass tags are made of solid Brass mosed to rigorous use. These tags are simple and made to last for applications such as pet identificatioaking them very robust and durable for heavy-duty applications where the tag may be expn tags, long term site identification, and industrial use. VERSITILE - can be easily stamped to suit many applications and needs HIGH QUALITY POLISHED BRASS FINISH - ball-burnished for a brilliant and reflective finish HEAVY-DUTY - good for many applications such as pet Tags, long term site I. D. , or industrial use DURABLE - solid Brass will not break, warp, or crack easily even with heavy use