Patent pending 4-flute design for fast dust removal</br>Carbide-tipped bit heads are harder?? tougher and more resistant to extreme loads for longer tool life</br>Set includes one of each HC2010?? HC2040?? HC2051?? HC2061?? HC2081?? and two HC2041 for handling a wide variety of applications</br>Storage case for easy access?? organizing and portability</br></br>Product Description</br></br>Set contains 1 each (HC2010)3/16-inch diameter by 2-inch useable by 4-inch overall;1 each (HC2040)1/4-inch diameter by 2-inch useable by 4-inch overall;1 each (HC2051)5/16-inch diameter by 4-inch useable by 6-inch overall;1 each (HC2081)1/2-inch diameter by 4-inch useable by 6-inch overall; and 2 each (HC2041)1/4-inch diameter by 4-inch useable by 6-inch overall tough?? C4 carbide bits with patented 4 flute design for long life and great precision.</br><br/>http://www.amazon.com/gp/product/B0000TZYZM