He used the geologist's hammer to pound in the tubes—the only time the hammer was used on Apollo 11—but was unable to penetrate more than  deep.
hiː jˈuːzd ðə dʒɪˈɑːlədʒˌɪsts hˈæmɚ tə pˈaʊnd ɪnðə tˈuːbz—ðɪ ˈoʊnli tˈaɪm ðə hˈæmɚ wʌz jˈuːzd ˌɔn ɐpˈɑːloʊ ɪlˈɛvən—bˌʌt wʌz ʌnˈeɪbəl tə pˈɛnɪtɹˌeɪt mˈoːɹ ðɐn dˈiːp.