Like a traditional gouge, the reverse bent gouge chisels start with a flat profile, and go through to a deeper profile. The shaft is also bent, allowing the very unique profile and bevel of this chisel to be used in hard to reach spaces.
Number. 25 chisels feature a deeper profile than the Number. 30, with the same reverse bent shaft, allowing this chisel to be used in hard to reach places, while removing good amounts of material.