cornstarIt's a mistake and obviously refers to the blade, but the tang is large and extends through the entire handle so it can be used for hammering so I guess you can say the handle hardness is also 59HRC? :)
The grip is a thick rubber which while it of course does not have 59HRC hardness, is very resilient.
The grip is a thick rubber which while it of course does not have 59HRC hardness, is very resilient.