Product Name:Automatic Threader When the needle is inserted, it will fix the needle to prevent the needle from falling off when replacing the needle. Product use: Used for threading sewing machines, lockstitch machines, needle change, sewing machine peripheral accessories, you can easily thread through the eye of the needle, eliminating the trouble of poor eyesight or poor lighting, in the change of the needle with the aid of this, you can firmly hold the needle does not fall off!