Our Aluminum Black Oval Key ID Tags are made of colored anodized aluminum (AL). Each key tag comes with a 5/8 inch split ring for attaching the tag. The Aluminum Black Oval Key ID Tags are professionally engraved providing you with maximum wearing time without loss of information through use. The Aluminum Black Oval Key ID Tag can handle 1 to 6 lines of personalization with 20 characters per line of information. For vertical line engraving (i.e. - numbered tags for lockers), please eMail or call us with your request.