Features Premium Carbide Material: The blue corn end mill engraving bits use ultra-fine grained carbide materials, with good milling and cutting performance, to ensure high efficiency. Excellent Performance: The milling groove, hole and edge of the board are clean, tidy and burr-free. Durable Design: The milling cutter carbide router cutting bits are made of high quality carbide material, has sufficient flexural strength and wear resistance. Wide Application: The carbide router cutting bits are used for PCB, SMT, CNC, mold, engraving, plastic, copper, stainless steel and other hardware processing. Practical Tools: 10pcs router cutting bits can be used for a long time. Specification: Item Type: Milling Cutter Material: Carbide Shank diameter: 3.175mm Blade diameter: 1.0mm, 1.2mm, 1.3mm, 1.4mm (optional) Blade length:  5mm (Blade diameter 1.0mm Router Cutting Bit) 6mm (Blade diameter 1.1mm Router Cutting Bit) 7mm (Blade diameter 1.2mm Router Cutting Bit) 8mm (Blade diameter 1.3mm, 1.4mm Router Cutting Bit) Full length: 38mm / 1.5in Uses: Used for PCB, SMT, CNC, mold, engraving, plastic, copper, stainless steel and other hardware processing. Package List: 10 * Milling Cutter Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List