Diablo's Top and Bottom Bearing Flush Trim Router Bits allow you to rout half the curve in one direction, flip the work piece over and rout the other half in the opposite direction without repositioning your pattern. Featuring TiCo carbide with titanium, these bits provide a long cutting life and ultra-fine finish. Perma-shield, Diablo's high performance coating, reduces friction and build-up on the bits. The bits kick-back reducing design allows for safer, more controlled cuts. These bits are computer balanced for a smooth and accurate cut. All Diablo router bits feature exceptional quality, unmatched precision and maximum cutting life.