Like Lincoln I too have used LeeValleys version and it does indeed work
well. HOWEVER that is only 1/2 of what you need to do to properly sharpen
the mortise chisel.
You should also polish smooth, a mirror finish is best, the outer 4 sides of
the chisel at the cutting end. This makes plunging the chisel go with much
One the outside of the chisels - DO NOT GRIND. Polish
the scratches out but don't go ape like you might for
a bench chisel - or turning gouge.
They make a slick little file for sharpening the bit. Has
non cutting sides so you don't accidently file were you
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