Tronex Class W cutters are made entirely from solid tungsten alloy steel. This material is machined and formed at the Tronex factory to high dimensional tolerances with exceptionally sharp cutting edges and a solid joint design. The cutters undergo a special furnace-hardening process to achieve a hardness of 66 to 68 HRC on both cutting edges. (Cutters made of carbon steel have maximum edge hardness of 62 to 63 HRC.) CLASS W cutters have smaller tips than CLASS T cutters. This property enables these cutters to cut in more confined areas than CLASS T cutters. CLASS W cutters are lighter than CLASS T cutters. The cutting edges of CLASS W cutters are also less brittle than cutting edges of CLASS T cutters.