Seco's line of Square 6™ shoulder milling cutters answers the need for added economy in square shoulder milling. This unique square shoulder milling cutter uses trigonal inserts with three cutting edges on each side - 6 total cutting edges to lower the cost per cutting edge. Inserts lock into place via a strong center screw placed in the same direction as cutting forces and wiper flats optimize surface finishes. The 90 deg setting angle ensures a true 90 deg square in one milling operation, eliminating the need for secondary operations and saving valuable production time and money.