Sheath cinches on with a leather strip.
$263 - With handles and sheath
6" in a straight line from tang to tang
These inshaves were designed with George Sawyer (Sawyer Made), who uses them for carving the seats of his Windsor chairs. It is designed to work like an old inshave he got from his father.
See a review from Lost Art Press.
Here is George using the inshave, showing how the curves work to shape and smooth a stool seat.
In the background you hear some of his students, scraping seats and turning legs.