BI-093C Bianco Custom Shop Swivel Thumb 6.25" including the finger rest.
This design helps to relieve the symptoms of corporal tunnel in the wrist by giving you a wider stance to open your hand.  takes a week or so to get used to but it helps.  Super smooth and razor sharp. Comes with a premium zipper case, removable finger incerts, & my exclusive service guauantee.  Only one available.
Made in the USA.