1 0.7mm Mini Drill Bit Set 3.175mm Shank Carbide Drill Bits for Drilling Print Circuit Board Drilling Tools 10pcs/box Suitable Materials 1. PCB, normal FR-4, CEM-3 boards, environmental protection board, SMT, CNC, molds, plastic, stainless steeland precision hardware processing; 2.Circuit board, carbon fiber, composite board, and so on. Features: 1. Precision machining by high accurate equipment; 2.With good milling and cutting performance, ensuring high efficiency; 3.High hardness, wear resistance, and intensity; anti-bending; 4.To removing chips, with big space and small resistance;Smooth chip removal, less heating value, to reduce pollution; 5.Sharp cutting edge, reduce cutting force, lower breaking rate and improve the quality of hole wall; 6.Symmetrical cutting blade, help to high effective cutting, avoiding drilling offset. Specification: Type: Drill Bit Material: Carbide Diameter: 0.7mm Shank: 3.175mm(1/8'') Cutting Length: 9mm Overall Length: 38mm 1