Solid carbide spiral twist drill bit set — 3 mm to 20 mm, 150 mm length, bright round shank. Designed for accurate, reliable metal drilling and easy handling. Key benefits Precise holes: solid carbide cutting edges and spiral flute geometry deliver consistent, clean holes in metal. Long reach and control: 150 mm overall length lets you access deeper holes while maintaining alignment. Easy to install and handle: bright round shank fits standard drill chucks for quick, secure insertion and removal. Efficient chip evacuation: spiral flutes move chips away from the cutting edge, reducing clogging and improving surface finish. Wide size coverage: comprehensive range from 3 mm up to 20 mm, including a 17 mm bit to meet common metalworking sizes. How this set solves common problems Reduces rework from misaligned or rough holes thanks to carbide rigidity and twist geometry for steady, accurate cutting. Minimizes downtime for bit changes with a broad size range that covers many typical metal drilling tasks. Improves drilling consistency on metal surfaces by clearing chips effectively and maintaining cutting contact. Key attributes Material: solid carbide Design: spiral flute twist drill bits Shank: bright round shank for standard drill chucks Size range: 3 mm to 20 mm (inclusive) Includes: 17 mm drill bit Length: 150 mm Typical applications Sheet metal fabrication: drilling mounting holes and clearance holes in steel or aluminum panels where clean, precise holes are required. Maintenance and repair: creating or enlarging holes in machine parts, brackets, and metal assemblies during equipment servicing. Metalworking projects: general-purpose drilling in workshops for prototype parts, fixtures, and structural fastenings. What to expect A reliable set for metal drilling tasks that require precision and a range of sizes. Compatibility with standard drill chucks and common handheld or bench drilling equipment. A single set that covers small- to large-diameter needs, including the commonly used 17 mm size. Specifications Material: solid carbide Type: spiral flute twist drill bits Shank: bright round Sizes: 3 mm, 4 mm, 5 mm, … up to 20 mm (inclusive); set contains sizes across this range, including 17 mm Length: 150 mm Use these bits when you need accurate, clean holes in metal with reliable chip removal and a convenient shank for quick chucking.