Product Overview

The 25-Piece Metric HSS Black & Gold Jobber Drill Bit Set (1.00mm to 13.00mm) is a premium, high-performance tooling package designed for machinists, mechanics, and metal fabricators who frequently work with metric fasteners. Spanning from 1.00mm up to 13.00mm in precise 0.5mm increments, this comprehensive kit ensures you always have the exact bit needed for metric pilot holes, clearance holes, and tap-drilling.

Constructed from premium High-Speed Steel (HSS), these jobber-length bits feature a dual "Black and Gold" surface treatment. This specialized coating combines gold oxide on the margins for exceptional lubricity and wear resistance, with black oxide on the flutes to hold cooling lubricants and rapidly evacuate metal chips. The entire 25-piece collection is housed in a rugged, shatter-proof case that easily withstands the inevitable drops, impacts, and heavy abuse of an active shop environment.

Key Features

• Comprehensive Metric Range: Includes 25 individual drill bits starting at 1.00mm and progressing up to 13.00mm in half-millimetre (0.5mm) increments, eliminating the need to cross-reference fractional equivalents.

• Black & Gold Dual Finish: The gold oxide margins reduce friction and heat buildup, while the black oxide flutes act as a sponge for cutting fluids, dramatically extending the overall lifespan of the cutting edge.

• 135° Split Point: Features an aggressive 135-degree self-centring split point. This prevents the bit from "skating" or wandering on curved or smooth metal surfaces and eliminates the need for a center punch.

• Jobber Length: The versatile, industry-standard jobber length offers the perfect balance between reach and rigidity, making these bits suitable for drill presses and handheld cordless drills alike.

• Shatter-Proof Case: Packaged in a highly durable, impact-resistant shatter-proof index case that keeps the bits securely organized, clearly labeled, and protected from shop damage.

Technical Specifications

Ideal Use Cases & Applications

• Metric Tapping & Fasteners: Essential for automotive technicians and machinists working on imported vehicles or machinery, providing the exact clearance and tap drill sizes for M2 through M12 metric threads.

• General Metal Fabrication: Highly effective for drilling through mild steel, aluminum, brass, copper, and cast iron in fabrication shops.

• Maintenance & Repair Operations (MRO): A reliable, go-to set for daily maintenance tasks where a durable, all-purpose bit is needed to drill through various materials on the fly.

• Wood & Plastics: While engineered for metal, the sharp 135-degree point and smooth flutes will cleanly bore through hard and soft woods, PVC, and acrylics without melting or tearing the material.

Common Questions (FAQs)

Q: Do I need a special metric drill chuck to use these?
A: No. These bits feature standard round shanks that will securely lock into any standard adjustable drill chuck on a drill press, corded drill, or battery-powered hand drill.

Q: What is the advantage of the 135-degree split point over a 118-degree point?
A: A standard 118-degree point often requires a center punch dimple to stop it from wandering when it first contacts the metal. A 135-degree split point is much flatter and features multiple cutting edges that instantly bite into the material, perfectly centring the hole from the very first rotation.

Q: Will this shatter-proof case fit in my toolbox drawer?
A: Yes. While specific dimensions vary by manufacturer, standard 25-piece metric jobber sets are housed in compact, low-profile index cases designed specifically to lay flat in standard mechanic's tool chest drawers.

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