The textbook adds concrete instrument terms beyond the three most familiar templates. Some involve consonant doubling or lexical shapes that should be learned as actual Arabic words.
ExampleMeaning or use
نِطَاقٌBelt/girdle
خِيَاطٌSewing implement
مِدَقٌّPestle or pounding implement
مِنْخَالٌSieve for flour
Instrument naming is partly pattern-based and partly lexical: students should not impose a single pattern on every tool word.