The Best Brass Jobber Drill Bits of 2023

COBALT STEEL - Manufactured from M35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times when compared with an average HSS drill bit.

135°SPLIT POINT - the 135°quick-cut split point are self-centering and able to penetrate metals quickly with less pressure, prevent bits from "walking and wanding". Easy cutting without need of center punch.

15PC METRIC SET - The set includes 15pcs of M35 cobalt steel twist drill bits: 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7 mm, 8 mm, 9 mm, 10 mm. Well organized in a plastic indexed storage case for easy transport to your worksite.

FOR METALWORKING - Particularly successful in cutting through hard metals(hardness less than HRC38°) such as stainless steel and cast iron, although they can be used for softer materials like copper and aluminium, too. Not for hardened steel / high carbon steel. Try to adjust the RPM when it fails to penetrate.

DOWNLOADABLE USER GUIDE - We've summed up some tips of drilling metals, including a RPM chart for several common metals, based on our reviews and some articles on the internet. In most cases, our customers would get a much better result with these tips. Welcome to download.

DURABLE AND PRECISE – Constructed with High Speed Steel (HSS) which provides a combination of hardness and toughness for wear resistance to take on intricate drilling tasks where accuracy is critical.

MULTIPLE USES – Gyros Wire Gauge Micro Drill Bits can be used with a wide range of hand and motorized tools for a better experience. These Straight Shank Mini Bits allow use with a wide variety of tool holding systems. Use with Gyros Mini Adaptor Chuck 45-01801 to use with most power rotary tools. Use with Gyros Swivel Head Pin Vise 97-01818 for all your hand drilling needs.

COMPLETE 20 PIECE SET - Gyros Mini Drill Bit Set comes complete with a range of small diameter twist drills sizes #60 (.0400”/1.016mm) through #80 (.0135”/.343mm) and therefore is preferred by Professional Craftsmen, Model Makers, Hobbyists, Jewelers, and Do-It-Yourself enthusiasts, and is a Must Have for all your drilling tasks.

CONVENIENT AND EASY STORAGE – These Gyros Mini Drill Bits come packaged in a convenient clear dome shaped storage case, with a protective pressure fit stand to secure drills and prevent any damaged or lost bits. The Gyros Micro Drill Bit stand also has an imprinted numeric gauge guide for quick and easy bit identification.

WIDE APPLICATION – All Gyros Wire Gauge Mini Drill Bits is perfect for all projects that require the drilling of precise holes. Gyros Micro Drills are ideal for gold, silver, wood, hard and soft metals, plastic, PVC, beads, and jewelry. Some people may even try to use it to clean emulsion tubes and jets in small carburetors. This Gyros Wire Gauge Mini Drill Bit set with a Clear Dome Storage is definitely the best choice for all your drilling tasks.

Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.

3 Steps Desigh for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic.

This Cobalt Drill Bit is Typically Capable of Running Three to Five Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.

The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding Throng the Material with a Blunt Drill Bit.

19Pcs 135 Degree Split Point Drill Bits Includes :1mm(length:3.4cm) 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm(length:8.5cm) 5.5mm 6mm(length:9cm) 6.5mm 7mm 7.5mm 8mm(length:11.5cm) 8.5mm 9mm 9.5mm 10mm(length:13cm) [DIA 0.5mm Increments] .

【Excellence Materials】 It is made of high quality alloy as raw material. The process of oxynitriding of the cutter head strengthen the drill hardness.

【Surface Electrophoretic Paint Process】Full-grinding and anti-rust treatment, clean and sharp without burrs. The drill bit is more wear-resistant and more durable, fully automated polishing, each one is unified.

【Unique Cross Design】Small incision resistance, feature drilling stably, fast speed, not breaking the border. Opening neat, smooth, no broken edges, no tremor phenomenon, chip easily.

【7 Different Sizes be Usable】3mm,4mm, 5mm, 6mm,8mm,10mm, 12mm, suitable for your different needs. It can be installed in the general electric hand drill, bench drill, the machine drill clamp range is 10 mm and above.

【Wide Range of Use】Professional glass and tile drill bits provide smooth and accurate drilling in ceramic tiles, marble, thin iron plate, mirrors and glass.

DEWALT drill bit set has connectable accessory storage system to optimize storage space

Patented bit-bar design of the drill bits set allows easy removal of bits and customizable placement

Clear lid of the titanium drill bit set allows you to easily see contents at glance

Clip latch for secure closing

Small Bulk Storage size fits inside the Small and Medium ToughCase plus (sold separately) - Ideal for organizing loose bits

Patented web taper increases the rigidity of the bit to decrease potential for bit breakage

Proprietary Pilot point tip delivers speed and clear, burr-free holes which help reduce bit walking

Ideal for metal, wood, and plastic

JOBBER LENGTH: 1/4-inch cutting diameter, 2-3/4-inch flute length, 4-inch overall length, 135 degree split point, 3-flat shank

MADE FROM HIGH-SPEED STEEL AND 5% COBALT: improve much higher heat resistance because of cobalt steel's high red hardness, provide strong durable performance compared to typical hss drill bits

CAN BE REPEATEDLY SHARPENED AS NEEDED: cobalt drill bit's hardness is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits

APPLICATION: best used for drilling in hard metal, including stainless steel

INCLUDE: 12 pieces of 1/4-inch cobalt drill bits with case

115 PIECES INCLUDED: 29pcs Fractional Size:1/16” to 1/2” in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60.

HSS WITH 5% COBALT: Durable, Higher Heat & Abrasion Resistance.

PRECISE 135° SPLIT POINT & TWIST DESIGN: Prevent walking, clear chips and particles faster.

PROFESSIONAL & WIDELY USE: M35 Cobalt HSS is more suitable for hardened material. Particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials.

ORGANIZED HOLDER: Set includes the drill bit holder with size index for easy storage and organizing.

【10Pcs 1/8" Cobalt Drill Bits】10Pcs - 1/8”(Dia 3.18mm) x1-5/8”(Flute Length 41.28mm) Metal Drill Bits.This drill bit fits the majority of power drill currently on the market and come with a portable plastic case for easy storage and organization.

【M35 Cobalt High Speed Steel】Industry grade 6542 high speed steel drill bit set, harder than 4241 HSS used in other similar drill bits set. These drill bits also contain 5% Cobalt, which increases wear-resistance and durability.

【Fully Ground Process & 135° Split Point】Fully ground spiral groove design clears particles quickly, decreases friction and heat for a faster and cooler drilling performance. 135° split point with straight shank prevents walking and makes drilling precise and faster. No center punch is needed.

【Multiple Application】Perfectly suitable for cutting through Hard Metal such as Stainless Steel, Steel, Sheet Metal and Cast Iron as well as Plastic, Aluminum Alloy, Wood and Other Softer Metals. ✔ Pay attention to speed, pressure and heat control during drilling.

【90 Days Warranty】If you are not fully satisfied for any reason, please contact us for 100% refund or replacement.

JOBBER LENGTH: 1/16-Inch cutting diameter, 7/8-Inch flute length, 1-7/8-Inch overall length, 118 degree point, straight shank

MADE FROM HIGH-SPEED STEEL AND 5% COBALT: improve much higher heat resistance because of cobalt steel's high red hardness, provide strong durable performance compared to typical hss drill bits

CAN BE REPEATEDLY SHARPENED AS NEEDED: cobalt drill bit's hardess is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits

APPLICATION: best used for drilling in hard metal, including stainless steel

INCLUDE: 12 pieces of 1/16-Inch cobalt drill bits with case