First Choice for High Productivity Helical Milling • M390 Series M390 With a replaceable nose collar and positive helix for increased productivity, the M390 Series Helical Mills provide optimal chip evacuation and performance with lower maintenance costs. • Strong insert and tool design for maximum productivity. • New SDMX inserts — helical cutting edge for smooth cutting. • Long edge shoulder ensures stable insert support. Positive pockets and geometry for free cutting action. Designed for optimal chip evacuation. Replaceable end cap for lower maintenance costs. Strong tool design for optimum insert support. K2 widia.com