Chisel sharpeners generally are made with a metal or Lexan frame. Some are able to be folded. They all have a sharpening stone. There are also sharpeners designed to be placed on the end of a drill.

The best places to go for pencil sharpeners are Office Depot, Office Max and staples, but anywhere that would sell art or school supplies will have pencil sharpeners.

Ceramic knife sharpeners can last for several years if you use them weekly. Metal sharpeners last much longer.

Chain saw sharpeners are not necessary but very beneficial if you want to cut a lot of wood. The chain will get dull. The hand held round file is one of the most common sharpeners used and very inexpensive.