4mm Tungsten Steel PCB Engraving Bit – Ultra-Precision CNC Milling Tool

Industrial-Grade Tungsten Steel
– High-density tungsten carbide core ensures extreme durability and wear resistance, outperforming standard carbide bits in longevity and precision.
Flat-Bottomed V-Shaped Tip
– Engineered for flawless PCB engraving, delivering clean, burr-free grooves with sharp 30° angled edges for intricate circuit board detailing.
Multi-Surface Mastery
– Perfect for CNC routers on PCBs, acrylic, wood, and soft metals. Ideal for DIY prototyping, industrial PCB repair, and precision model making.
Mirror-Finish Polish
– Laser-calibrated cutting edges minimize friction for smoother operation and reduced material tear-out, ensuring professional-grade results every time.
Global Bulk Supply Advantage
– Direct-from-factory pricing with wholesale discounts for large orders, backed by fast international logistics. Stock up for workshops or resale without markup.