Key ring for storage serves as a handle also Install and adjust standard Mil-Spec A2 front sights on AR-15 M16 and M4 Black zinc-plated steel This Wheeler Engineering Delta Series Front Sight Tool is a 4-prong design to adjust the A2 front sight found on the AR-15 M16 and M4 style of rifles. The black zinc plated steel will stand up to years of use. A 1/4 hex shaft allows the use of a standard hex driver and the hole for a key ring ensures this tool will always be close at hand on range day.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }