Bought this for my husband. Here's what he said: That's a very good set of stamps. Ideal for repairing damaged threads or trimming threads if you are using a softer material. They are not adjustable and have an external hexagon. So you can turn them with an adjustable wrench. No expensive die handle required. This set is for the right hand only. With any die, I recommend putting some oil on the blank so you don't get hot and chip the cut edges of the die. The wooden case is an added bonus that most manufacturers shy away from.