Our engraved small stainless steel id tags are unmatched for their durability and classy good looks. The tags are cast from yacht grade duplex 2205 stainless steel at a foundry here in Maine. The duplex 2205 stainless steel alloy we use is unsurpassed for its hardness and non-corrosive properties, which means the alloy will NEVER rust (even in salt water), shrivel, bend, blacken, become dull, or wear through at the loop. 7/8″ in diameter, the tags are also thick and measure the whopping equivalent of two dimes stacked together. A very thick bale or loop insures the tags will not wear through, fall off, or be lost. If you are looking for a truly indestructible tag for your little guy or gal, this is the one, and they are CHEW PROOF!