Features: 1. Large Space for Chip Removal -- Small chip removal resistance, smooth chip removal, low heat generation. 2. Excellent cutting edge sharpness - With advanced grinding technology, the cutting edge of the drill bit is sharper than before, which can reduce the cutting force, reduce the drilling rate and improve the quality. 3. Tool Design Based on Customer Needs - A wide variety of drills to meet different application needs. All parameters of the drill bit, such as core thickness and core taper, have been carefully designed and effective. 4. Strictly Symmetrical Cutting Edge -- It is beneficial for efficient cutting and avoiding drilling offset. 5. Processing Range -- Printed Circuit Board, SMT, CNC, mold, engraving, plastic, copper, stainless steel and other hardware processing. Specification: Condition: 100% Brand New Item Type: Drill Bit Material: Carbide Quantity: 50pcs Size: 0.25-0.45mm Processing range: Printed Circuit Board, SMT, CNC, mold, engraving, plastic, copper, stainless steel and other hardware processing. Package List: 10 * Drill Bit 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. 1、Large Space for Chip Removal -- Small chip removal resistance, smooth chip removal, low heat generation. 2、Excellent cutting edge sharpness - With advanced grinding technology, the cutting edge of the drill bit is sharper than before, which can reduce the cutting force, reduce the drilling rate and improve the quality. 3、Tool Design Based on Customer Needs - A wide variety of drills to meet different application needs. All parameters of the drill bit, such as core thickness and core taper, have been carefully designed and effective. 4、Strictly Symmetrical Cutting Edge -- It is beneficial for efficient cutting and avoiding drilling offset. 5、Processing Range -- Printed Circuit Board, SMT, CNC, mold, engraving, plastic, copper, stainless steel and other hardware processing.