Identification marks are the width, the number of stabilizing pieces, and the reflection band. The double stabilizing piece indicates full hollow grind. A straight grind or non full hollow grind razor can be identified by its single straight stabilizing piece. Instead, the razor may have a single semicircular stabilizing piece, which we also only find in full hollow grind razors. The reflection band is caused by the diverging light rays on the convex surface of a ridge, which is the belly. This too is specific for full hullow grind razors.