Columbia 4" Direct Corner FlusherColumbia Direct Corner Flushers have redefined angle finishing. They are built from the best materials, but above all, they are each hand ground and checked on a granite plate for perfection. Each one comes with wheels and an allen key for those who prefer not to use them. Features: Precision hand ground and set Wheels come standard Hand made from U. S. aluminum and steel components Machined in Columbia's state of the art facility in Canada