These are overruns from large custom order, the tools only have a 2 overall length and a .600 (5/8) length of cut
The flutes are designed to push the chips downward and they also help with fraying and chipping on your workpiece. This tool work really well for wood and even on plastics and aluminum. Made in the USA
Tool Size - 1/4 x 2
Tip diameter - 1/4"
Length of cut - 5/8