I've never though about wearing a screwdriver around my neck, but I might do with this one! I'm not totally sure but would guess it's hand forged, and the snake-like "handle" allows for a good grip making it both very useful and very fun to use!
5 7/8" long x 1" wide x 1/8" thick. The flathead is 3/16" across. Great condition, and with the closed loop at top it would indeed be easy to wear!