this, plus he got a new vesselI believe he can use his arms because his soul was fractioned/copied into Anko's curse mark prior to his being sealed by reaper death seal.
Sorry i can not read kanji私は彼の魂は前に彼の刈り取り死シールにより封止されているにアンコの呪いマークに分画し/コピーされたので、彼は武器を使用することができます信じています。
Here is the answer to the questionHe used his arms lol he removed Kabutos chakra with his arms.
i dont think so cause that was originally his chakra to begin with and oro can spit snakes and spit his body and the charkra he took was flesh so maybe he can use his hands or he can i dontHe used his arms lol he removed Kabutos chakra with his arms.