Self-Threading: No.4-8 6stkThe eyes on self-threading needles have a spring opening through which the thread is pulled into the eye of the needle. Designed to help those who have difficulty threading an ordinary needle. The best carbon, hardened, tempered steel is used to maximise resistance to corrosion. The tapered and slightly conical points plus a polished body ensure the best penetration into fabrics. The needle eyes are smooth with no snags and protect the thread from damage.