3/8" Downshear Rougher 3-Flute | 1" LOC | 3" OAL | 3/8" Shank

When you need to move material fast, this solid carbide 3/8" downshear rougher is the right tool. The 3-flute chipbreaker profile — also known as a serrated or castle rougher — breaks chips into shorter segments as it cuts, which dramatically reduces cutting forces, heat, and vibration compared to a standard spiral. That lets you run higher feed rates and deeper single-pass depths than you'd otherwise attempt. The downshear direction also keeps chips pressed into the cut rather than lifted, which helps protect top surface quality during aggressive passes. It measures 1" cut length, 3" overall length, 3/8" shank. Solid carbide, Made in the USA by Centurion Tools LLC.