50PCS Carbide Micro Drill Bits Set 0.1-1.0mm PCB Driiling Bit for CNC Engraving Product Features: Precision machining by high accurate equipment; With good milling and cutting performance, ensuring high efficiency; High hardness, wear resistance, and intensity; anti-bending; To removing chips, with big space and small resistance Sharp cutting edge, reduce cutting force, lower breaking rate and improve the quality of hole wall; Symmetrical cutting blade, help to high effective cutting, avoiding drilling offset. Note: Suitable Materials: PCB, normal FR-4, CEM-3 boards, environmental protection board, SMT, CNC, molds, plastic, stainless steel and precision hardware processing; Circuit board, carbon fiber, composite board, and so on. Product Specification: Type: PCB Drill Bit Meterial: Carbide Shank: 3.175mm(1/8'') Size Including: 0.1mm 0.2mm 0.3mm 0.4mm 0.5mm 0.6mm 0.7mm 0.8mm 0.9mm 1.0mm each size 5PCS Package Included: 50PCS PCB Drill Bits Set