Complex sentence: Sometimes it is made of metal or plated with metal for extra strength; also, a full-size "bō" is sometimes called a "rokushakubō" (六尺棒: ろくしゃくぼう).
Split into simpler sentences: Sometimes it is made of metal or plated with metal for extra strength. A full-size "bō" is sometimes called a "rokushakubō" (六尺棒: ろくしゃくぼう).