Hi Jerry,
The "Fein multimaster" is a great tool to add to your arsenal. It uses an oscilating motion which makes it very versital. There are many different attachments available to handle numerous operations. The best way to learn about it would be to visit "feinus.com". There are different models available with various attachments included. THe bottom line on these babies is, YOU GOTTA HAVE ONE BUT, THEY AIN'T CHEAP !!