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Jobber drill bits are essential for creating precise holes in various materials, from wood to metal. Selecting the right type ensures efficient work, prolongs tool life, and prevents material damage. Understanding key features can help you make an informed decision for your specific needs.
Cobalt M35 Material: High cost, but hardness is up to 67, cut faster and has a long life, up to 12 times compared with the average HSS titanium coated bit, save time and improve efficiency
Hardened Full Grinding Process: Increases wear resistance, sharp and durable, used for stainless steel, cast iron, zinc alloy, titanium, hard sheet, mild steel tube, flat bar, aluminum, hardened metal, plastic and wood
Packaging: Hard and thick plastic box, drills bagged for compartmentalized storage, reasonable design, well secured package
Convenient Access: Various sizes are placed in different compartments of the plastic box, and the corresponding sizes of different drills are printed on the bottom of the lid, making it very convenient to access
Widely used: Whether you're a home DIYer / Beginner or workshoper of professional drilling, it's a great tool
Use Notices: Drill bit should be vertical to the workpiece when used; controling low speed from 200 to 1000 rpm; using cutting fluid will stay cool to make the bit last longer
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
M35 Cobalt Drill Bit: The M35 cobalt drill bit is a durable, sharp and robust drill bit suitable for cutting stainless steel, iron castings, copper, aluminum and other soft metals as well as plastics, wood etc
Quick and Efficient: The cobalt drill bit set can be used effectively on most soft and hard objects, with a 135 degree point tip and twist design for faster cutting, self-centering to prevent walk-off and faster chip and particle removal
HSS Drill Bit Set: HSS Jobber Length Drill Bit Kit for hardened steel with excellent cutting performance. 29 sets of drill bits for long term use. The inserts are hardened and polished for improved sharpness and precise cutting without wobbling
Easy Storage: The drill set includes drill holders with size indexes and is packaged in a small, strong package for easy storage and sorting. If you have any questions, please refer to us and we will be happy to help you
Premium Black and Gold: Made from high-speed steel with a black and gold oxide coating, which increases wear-resistance and durability. making them be particularly suitable for drilling through tough materials.
Fast and Efficient: 135° Split Point Design and Fully Ground Process for faster cutting,self-centering to prevent walk-off, and faster chip and particle removal.
29 Pieces Drill Bit Set Includes...
Wide 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.
Warms Tips: Pay attention to speed, pressure and heat control during drilling. If you have any questions, please refer to us and we will happy to serve you.
Various Sizes: 115 sets of drill bits include 29pcs Fractional Size:1/16” to 1/2” in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60
M35 Cobalt Drill Bit: The M35 cobalt drill bit is a durable, sharp and robust drill bit suitable for cutting stainless steel, iron castings, copper, aluminum and other soft metals as well as plastics, wood etc
Quick and Efficient: The cobalt drill bit set can be used effectively on most soft and hard objects, with a 135 degree point tip and twist design for faster cutting, self-centering to prevent walk-off and faster chip and particle removal
HSS M35 Drill Bit Set: HSS Jobber Length Drill Bit Kit for hardened steel with excellent cutting performance. 115 sets of drill bits for long term use. The inserts are hardened and polished for improved sharpness and precise cutting without wobbling
Easy Storage: The drill set includes drill holders with size indexes and is packaged in a small, strong package for easy storage and sorting. If you have any questions, please refer to us and we will be happy to help you
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 1/8-inch cobalt drill bits with case
Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Jobber Drill Bits
Material Type
Consider the primary materials you'll be drilling into. High-speed steel (HSS) is a versatile choice for wood, plastics, and soft metals. Cobalt bits offer superior hardness and heat resistance, making them ideal for drilling into stainless steel and other tough alloys. Titanium-coated bits provide an extra layer of hardness and lubricity for increased lifespan in metals.
Bit Diameter and Length
The required diameter of your holes will dictate the drill bit size. Standard jobber bits come in a wide range of diameters. Length is also crucial; longer bits allow you to drill deeper holes, but shorter bits generally offer more rigidity and accuracy.
Flute Design
The flutes are the spiral grooves on the bit. Standard 118-degree flutes are suitable for general-purpose drilling in softer materials. A 135-degree split-point tip is often preferred for harder metals as it reduces the need for a pilot hole and prevents the bit from wandering.
Frequently Asked Questions
What is a jobber drill bit?
A jobber drill bit, also known as a general-purpose drill bit, is designed for drilling holes in a wide variety of materials. They are characterized by their medium length and are a common choice for both DIYers and professionals.
How do I choose the right material for my drill bits?
For general use on wood, plastic, and softer metals, high-speed steel (HSS) is a good option. If you frequently drill into harder metals like stainless steel or cast iron, consider cobalt or titanium-coated bits for better durability and heat resistance.
What is the difference between 118-degree and 135-degree drill bits?
The angle refers to the point of the bit. A 118-degree angle is standard for general-purpose drilling in softer materials. A 135-degree angle, often with a split point, is better for harder metals as it offers more stability and reduces the risk of the bit wandering.
How long should my drill bit be?
The length of the drill bit depends on the depth of the hole you need to create. Jobber bits are medium length, suitable for most common applications. For very deep holes, you might need to consider extension bits.
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