The theory is that you can push down the plunger and a "U"-shaped metal hook emerges. You grasp a sewing machine needle in the hook of the tool and release the plunger and the needle is now held securely in the tool and it will be easier to insert in the needle clamp of the sewing machine. Once the needle is installed, you push down the plunger again to release the needle. I could not order just one to examine, the minimum quantity I could order was three, so I ordered three.
When they arrived, I took one out of the package for a look-see. The third time I pushed the plunger, the metal hook broke off, the plunger fell out and the spring shot across the room.
No way can I sell these, If you want one for yourself, order some needles from my Etsy shop and specify that you want a Needle Grabber and I will include it in the next two buyers' packages free of charge. Just be aware that you have been informed of the inherent dangers and that wearing eye protection when using would be advisable.
SUPERMATIC UPDATE:
I am not happy with this machine. It is fussy about the material I try to sew, the stitches are too short for many of the things I sew, the friction wheel drive slips, and the knee lever speed control is too sensitive - I am constantly bumping it and running the machine without fabric under the foot. Anyone who sews knows what happens then, the needle thread gets caught around the hook and has to be worked out. The stitch and friction wheel issues might be correctable but I don't see any way to overcome the kneebar problem.
I have never done this before to a complete machine in good cosmetic condition but I am going to part this one out and sell the pieces in order to recoup my investment and free up space in my sewing room.
If you need any parts from a tan Supermatic, email me at my gmail address OldSewingMachines.
Ed

