Best Zinc Jobber Drill Bits in 2026

Bright finish: Classic M2 High Speed Steel construction with Bright Finish for proven capability and durability.

Strength & Hardness: Made with HSS M2 steel, Rock wall Hardness Level HRC 62-63.

Package & Size: 12 Pieces in a plastic bag, Diameter 5/16 inch, Total length 4 inch, Working length 2-3/4 inch.

Accuracy & Longevity - 135 degree split point starts drilling immediately requires less force and eliminates “walking” across the working surface. Tapered web provides strength, durability, and reduces breakage.

Three-Flat Design - Three flats on shank eliminate bit spinning in chuck. Our proprietary parabolic flute design brings optimal chip removal which reduces heat build-up.

Wide Range of Uses - Drill bits are built for general purpose applications, such as steel/copper/aluminum/zinc alloy/wood/plastics. Also, it's ideal for DIY projects and home maintenance. Durable and reliable quality.

Durable Construction - HSS material with black and gold coating increases lubricity, provides corrosion protection, and increases durability. Ensures longer tool life in multiple working conditions. Tapered web provides strength, durability and reduces breakage.

No Center Punch is Needed - 135° split point design for fast penetration with less pressure. Twist drill bit kit will not "Walk" or "Wander".

Parabolic Flute - Parabolic flute for better chip removal and reduced heat build-up.

20PCS,3/32",HSS Cobalt Jobber Twist Drill Bits,ideal for drilling on mild steel, copper, Aluminum, Zinc alloy etc with Packing 10pcs in Plastic Bag

High Quality Material- High Speed Steel Cobalt -M 35 Cobalt Steel Best Material.

High Efficiency In Drilling Metals, and Stainless Steel.

Bright finish: Classic M2 High Speed Steel construction with Bright Finish for proven capability and durability.

Strength & Hardness: Made with HSS M2 steel, Rock wall Hardness Level HRC 62-63.

Package & Size: 12 Pieces in a plastic bag, Diameter 3/16 inch, Total length 3-1/2 inch, Working length 2-5/16 inch.

Bright finish: Classic M2 High Speed Steel construction with Bright Finish for proven capability and durability.

Strength & Hardness: Made with HSS M2 steel, Rock wall Hardness Level HRC 62-63.

Package & Size: 12 Pieces in a plastic bag, Diameter 5/32 inch, Total length 3-1/8 inch, Working length 2 inch.

3-Flat Shank and 135° Split Point - Three flats on shank eliminate bit spinning in chuck. 135° split point designed for clean and accurate holes, requires less force and eliminates “walking” across the working surface.

HSS - Premium high speed steel for the durability of drilling in tough materials. Proprietary parabolic flute design brings optimal chip removal and reduced thermal build-up.

Black & Gold Finish - Premium gold and black nitride dual coating provides maximum corrosion resistance and durability.

Material: YG Cemented Carbide + Chrome Vanadium Steel. Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel.

The mistake that a lot of people make is using high speed steel twist drills at high speeds. If you search for "machining speeds and feeds" you will find a lot of information about the correct speeds to run cutting tools against different types of metal. Twist drills are the category of cutting tool you are looking for.

As soon as the heat starts to build up on the tip, the drill bit can lose the hardness that make it a cutting tool. Using HSS drills at low rpm with cooling fluid or lubricant can provide a large quantity of successful holes in metal. TThere have chunks of carbide on the end, and carbide will make easy work of even the hardest steel, and allow you to use high rpms. (In the process of opening holes to continue to add water for cooling.)

Cobalt drill bits: Classic M2 High Speed Steel construction with Black and Gold finish for proven capability and durability.

Hardness: M2 Twist drill bits’ Rock wall Hardness Level HRC 62-63.

Package & Size: 12 Pieces drill bits in a plastic bag, Diameter 5/16 inch, Total length 4-1/2 inch, Working length 3-3/16 inch.

Cobalt drill bits: Classic M2 High Speed Steel construction with Black and Gold finish for proven capability and durability.

Hardness: M2 Twist drill bits’ Rock wall Hardness Level HRC 62-63.

Package & Size: 12 Pieces drill bits in a plastic bag, Diameter 7/32 inch, Total length 3-3/4 inch, Working length 2-1/2 inch.

Bright finish: Classic M2 High Speed Steel construction with Bright Finish for proven capability and durability.

Strength & Hardness: Made with HSS M2 steel, Rock wall Hardness Level HRC 62-63.

Package & Size: 12 Pieces in a plastic bag, Diameter 7/64 inch, Total length 2-5/8 inch, Working length 1-1/2 inch.

POINT DESIGN: 135° split point design increases cutting speed with self-centering feature and prevents drill bit walking or wobbling on working surface.

REDUCED SHANK with THREE FLATS: 1/2" reduced shank drill bit with tri-flat is designed to eliminate drill bits spinning in the chuck and ensures grip. Superior black oxide finish offers great wear resistance.

WIDE FLUTE: Parabolic flute design improves chips removal and prolongs drill bits life while drilling in metal and wood.

Bright finish: Classic M2 High Speed Steel construction with Bright Finish for proven capability and durability.

Strength & Hardness: Made with HSS M2 steel, Rock wall Hardness Level HRC 62-63.

Package & Size: 12 Pieces in a plastic bag, Diameter 9/32 inch, Total length 4-1/4 inch, Working length 2-15/16 inch.

Black gold high speed steel is the long lasting material when it comes to common drill bit materials, not only will the bit's structural integrity withstand tremendous heat and wear, but more importantly black gold bits can drill through tougher materials than common HSS bits.

With a 135 degree split-point, these drill bits will catch on the work-surface with greater ease and not wander all over the surface making scratch-marks. This means that after securing the bit in the machine all that is needed is a steady hand to point and apply pressure, and that's it.

The straight round shank of our bits means you can use this drill bit with nearly all types of machines.

Bright finish: Classic M2 High Speed Steel construction with Bright Finish for proven capability and durability.

Strength & Hardness: Made with HSS M2 steel, Rock wall Hardness Level HRC 62-63.

Package & Size: 12 Pieces in a plastic bag, Diameter 9/64 inch, Total length 2-7/8 inch, Working length 1-3/4 inch.

5/16 Inch HSS Jobber Length Twist Drill Bits,ideal for drilling on mild steel, copper, Aluminum, Zinc alloy etc.

High Quality Material- High Speed Steel

High Efficiency In Drilling Metals, and Stainless Steel.

10PCS,3/32",HSS Cobalt Jobber Twist Drill Bits,ideal for drilling on mild steel, copper, Aluminum, Zinc alloy etc with Packing 10pcs in Plastic Bag

High Quality Material- High Speed Steel Cobalt -M 35 Cobalt Steel Best Material

High Efficiency In Drilling Metals, and Stainless Steel.

Cemented Carbide Tip: 11mm twist drill bits are made of cemented carbide tip for long service life, more sharp and durable than others

Features: Milled U-flutes with deep-cut spiral provides fast material removal. Suitable for drilling in tough metal, including abrasive alloy and hardened steel

Use For: Drilling clean, accurate holes in sheet metal, steel, copper, brass, aluminum, plastic, wood, stainless steel and cast iron

TITANIUM | HIGH-SPEED STEEL: Made from 100% High-Speed Steel Construction with Titanium Coating for Proven Capability and Durability. Be equipped with every drill bit size you need in our handy and portable HSS metal drill bit kit. You will find long drill bits as well as small bits inside the metal storage box.

STRENGTH & DURABILITY: Made with HSS , Rockwall Hardness Level. Each of our HSS metric drill has been coated in Titanium as it is well reported to resist heat and friction giving you a quality finish and a longer lasting drill bit. Quality is as good as any major brand such as drill bit set.

METAL STORAGE BOX: Your order comes in a handy metal box with handle for all 99 Pcs bits, each drill bits have its own clearly labelled designated storage spot which makes it the best craftsman drill bit kit.

10PCS,5/64",HSS Cobalt Twist Drill Bits,ideal for drilling on mild steel, copper, Aluminum, Zinc alloy etc.

High Quality Material- High Speed Steel Cobalt -M 35 Cobalt Steel Best Material.

High Efficiency In Drilling Metals, and Stainless Steel.

Twist Drill Bits Titanium Coated : Classic 4241 High Speed Steel construction with Titanium Coating for proven capability and durability.

Strength & Hardness: Made with HSS 4241 steel, Rock wall Hardness Level HRC 60-62.

Package & Size: 10 Pieces in a plastic bag, Diameter 5/64 inch, Total length 2 inch, Working length 1 inch.

5PCS,21/64" Inch HSS Jobber Cobalt Twist Drill Bits,ideal for drilling on mild steel, copper, Aluminum, Zinc alloy etc.

High Quality Material- High Speed Steel Cobalt -M 35 Cobalt Steel Best Material

High Efficiency In Drilling Metals, and Stainless Steel.