Single beveled like it is supposed to be for making pegs or roughing out and other timberframing tasks.

This hewing hatchet is for fast rough shaping, dimensioning and smoothing of wood. One face is ground flat to the cutting edge, so it can be swung flush along a surface. For right-handed use, convertible to left-hand by remounting the head on a new handle. Blade is 4-1/2"; length is 15-1/2". 2-1/2 lbs.

from $35.99