Check the listing for details. 50PCS Carbide Micro Drill Bits Set 0.1-1.0mm PCB Driiling Bit for CNC Engraving. Color: As shown in pics, Condition: New. Listed at 11.43 USD. Item number:4050Product description: Type PCB Drill Bit Package Quantity 50PCS Shank Diameter 3.175mm(1/8'') Qty 50PCS Size 0.1mm 0.2mm 0.3mm 0.4mm 0.5mm 0.6mm 0.7mm 0.8mm 0.9mm 1.0mm each size 5PCS Meterial tungsten steel Color Different batches may have different colors, which does not affect the use Application SMT, CNC, molds, plastic, stainless steel and precision hardware Applications PCB, normal FR-4, CEM-3 boards, environmental protection board Feature1 With good milling and cutting performance,high efficiency Features High hardness, wear resistance, and intensity; anti-bending Suitable For Circuit board, carbon fiber, composite board, and so on.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: 1. PCB, normal FR-4, CEM-3 boards, environmental protection board, SMT, CNC, molds, plastic, stainless steel and precision hardware processing; 2. Circuit board, carbon fiber, composite board, and so on.Package included: 50PCS PCB Drill Bits Set