- This works far better than the 115 Cutter for my purpose, which is cutting a 1/8" "lip" into 1/4 to 5/16" hardwood - mostly tropical hardwood.  With definite emphasis on the "hard" part!  Now, granted, the 115 *is* described as being designed for "soft" materials, and I *had* looked at the fluted Tungsten Carbide cutters, which are described as being "for hard materials", but I wanted a larger cutting head and, most especially, something with a cutting surface on the flat end, not just the sides.