Works with 9-12 size needlesContains 1 Needle ThreaderThe Sewline Needle Threader only works with 9-12 size needles. Simply insert the needle in a guide hole, lay the thread across a positioning groove and press lightly down on the lever. The thread is guided cleanly through the needle eye. This smart little threader also stores needles and features a magnetic end to quickly pick up wayward needles.