The patent needles, also called blind needles, have a special open and springy eye.
They are relatively easy to thread since you only have to pull the taut thread through the two eyes, and the thread is held in place as a result.
This means that even people with visual impairments have no problems threading them.
In addition to this special, burr-free eye, this needle features the known quality parameters of a classic sewing needle, such as the even, pore-free surface for smoothness, the calibrated spring hardness, and the long and particularly slender tapered point.
Prym offers patent needles, also called blind needles, in packs of 6 in sizes No. 5 to 9.