The Wheeler Engineering Delta Series AR Front Sight Tool is designed to adjust the A2 front sight found on the AR-15, M16 and M4. The tool can be used with most 1/4" hex drivers and features a key ring for storage that also serves as a handle. Black, zinc-plated steel construction. Designed to adjust standard MIL-SPEC A2 front sights on AR-15, M16 and M4 firearms. Black, zinc-plated steel construction. Can be used with most 1/4" hex drivers. Key ring for storage serves as a handle.