ITEM NAME:10pcs 1.5mm Tungsten Steel PCB Carbide End Mill Printed circuit board cx Descriptio n Description: 1.These Long-Lasting Bits Are Made From High Quality Tungsten Steel For A Precise,Easy Experience 2.These Car.Mainly Applies To Copper, Aluminum,Fiberglass,Carbon,Circuit Board,Wood And Most Plastic Including Acrylic. Specifically Designed For Trace Isolation Patterns Cutting On Circuit Boards,These PCB Drill Will Give A Clean Burr Free Cut.