STUBAI - The #5538 series are SHORT BENT, REVERSE GRIND gouges with a #8 flute or sweep.
Note: The code explained. For a tool designated for example as as a #553812, the 55 is the SERIES, 38 is the PATTERN & CURVATURE OR SWEEP and 12 is the nominal WIDTH in mm at the tip.
Back bent gouges are a specialty tool for working convex surrfaces such as mouldings or rope or plant forms.
Click HERE to go to a Data Sheet on Stubai carving tools. This data sheet will explain the nomenclature used for carving tools of which there are hundreds of variants.
Click HERE to see a .pdf of the makers Series 55 catalogue.