Do you have old chisels and planes laying around that you never use because of the state of the steel? Then you need a good sharpening jig. This Ram-Pro guide is a really simple design but does the job of sharpening your tools just fine.

It has two slots to accommodate wide and thin steels. The widest one you can fit is 3⅛”.

It requires that you already have a quite good established edge, otherwise you need some sort of protractor to set the right angle. To set the angle on the jig you simply just slide the steel up or down to change the angles.