Lifehack: pins on hand

I always use pins when I sew something. It is convenient when they are always at hand.

I came up with a simple and convenient device-magnet. I attached it to the sewing machine. I can always quickly take / put a pin.
Note: I have an industrial sewing machine, has a metal case. Therefore, the magnet is easily attached / removed. On the plastic case of the machine, the magnet can probably be attached to a special glue.