The 25degree bevel is called the grinding bevel youll use a bench grinder to renew it. The 30degree bevel is called the honing bevel youll use a honing stone or sandpaper to create it. Grinding goes fast, but honing can be slow. If your chisel had only one bevelthe 30degree oneyoud have to hone its entire surface to get a sharp edge..Get Latest Price
You can click the link below to learn more.