"Leather on blank is intended for finishing the cutting edge. It's clamped into the abrasive holder. Leather fixes the uneven surface of the cutting edge and strengthens it. Worksurface is made of extremely smooth cow leather, glued onto the aluminum blank. Blank length: 150 mm Width: 25 mm Leather thickness: 3 mm Blank thickness: 3 mm "Move such blanks with leather only towards yourself!"