Traditional woodworkers use them to trim intricate joints to finished dimension.
For light-duty use, e.g. finishing of finger joints and dovetails. Thin blades, triangular cross-section, finely ground right to the edge. Handles made of Japanese red oak.
Chisels with tapered blade, ideal for undercutting in joinery and for cleaning corners. The handles are made of Japanese red oak and have forged steel hoops.
This steel allows the sharpest edge! They are used to shave off small amount of material in joinery and are only pushed by hand. Never use a mallet and never leverage chunks.