Bassett MDE-4B Series Solid Carbide General Purpose End Mill, TiCN Coated, 4 Flute, 30 Degrees Helix, Ball End, 0.375' Cutting Length, 1/8' Cutting Diameter, 3' Length (Pack of 1): Ball Nose End Mills: Industrial & Scientific. Bassett MDE-4B Series Solid Carbide General Purpose End Mill, TiCN Coated, 4 Flute, 30 Degrees Helix, Ball End, 0.375" Cutting Length, 1/8" Cutting Diameter, 3" Length (Pack of 1): Ball Nose End Mills: Industrial & Scientific. Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems 。 Titanium carbonitride coatings are harder and more wear-resistant than TiN for improved tool life and faster cutting speeds 。 Round shanks allow use with a wide variety of toolholding systems 。 When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging 。 4-flute end mills are most commonly used in profiling and in harder materials; stiffer construction results in minimal deflection 。 Made in the USA 。 Bassett MDE Series general-purpose double-end solid carbide end mill with ball nose end geometry for steel, cast iron, non-ferrous materials. 10 percent cobalt submicron grain carbide substrate. 30 degrees right-hand spiral, right-hand cut helix designed for maximum chip clearance. Double-end end mills economically increase productivity. 4-flute end mills are most commonly used in profiling and in harder materials; stiffer construction results in minimal deflection. They also provide good surface finishes and wear-resistant characteristics for excellent size control. 。 。 。