Drill Bit Categories & Their Uses

Drills are handy tools that are widely used in almost all industrial and DIY applications to create holes, almost always,of circular cross-section. Drill bits, on the other hand, are the accessories attached to the drill in order to perform this task. However, to ensure that you do not destroy the material you are drilling into, it is imperative that you use the correct drill bit for the said task.

The following is a comprehensive list of the most common drill bits and their uses.


High-speed steel (HSS) is one of the most commonly utilized materials in the manufacture of drill bits. It is suitable for drilling wood, plastic, and soft metals. High-speed steel bits are made from carbon steel with chromium and vanadium additives.

2.    COBALT

Thanks to cobalt’s immense structural strength, cobalt drill bits are especially adept at drilling through stainless steel and other tough materials. Cobalt alloys have an exceptional ability to withstand heat and resistance. Sometimes, these drill bits consist of an alloy of cobalt and HSS. Such an alloy guarantees you a bit that can go through just about any surface.


There are numerous types of drill bits in the market based in their construct as well as area of application. To help you understand this better, we shall first discuss the construction of different bits:


Drill bits are made from different materials to suit their purpose. Using the right bit material enhances your efficiency. It also saves money, purchasing a drill bit that cannot handle your project.

While almost all bits are made from metal due to its toughness, the difference comes in the metal composition. The following are some common materials used in drill bits.


Carbides are one of the strongest substances on the planet. In fact, some carbides rival diamonds for the hardest material known to man. They are formed when carbon is combined with metal. Nonetheless, carbide is extremely expensive. As a result, it would not be feasible to make an entire bit out of the substance.

This is why manufacturers prefer making only the tips out of carbide. Carbide-tipped bits are typically used for masonry, tile, and concrete drilling.


When handling projects involving extremely tough materials, it would be a good idea to consider solid carbide bits. Unlike carbide-tipped bits, solid carbide bits consist entirely out of carbide.


You can also classify drill bits according to the coating they have which include:

  1. Black Oxide: helps the bit to retain lubricants to prevent the onset of rust.
  2. TiN Coated: TiN refers to titanium nitrate, which slows the progression of wear on bits that drill hard metals
  3. TiAIN Coated: titanium aluminum nitrate coating increases a bit’s resistance to abrasion and heat
  4. SG Coated: a silicone multilayer that helps a drill bit to penetrate dense metals.

Safety Helmets Colour Code Guide

Maintaining the proper fit and style of PPE is important. Industrial plants and sites that have a risk of injury or accidents are required to ensure the proper safety of people. Safety helmets come in to protect our head from any kind of fatal injury or accident while working in a danger-prone area. Various kinds, types of fits, and types of safety and PPE equipment are available in the market. But choosing the right one is important as it’s for the sake of work and death!


Safety helmets come in pre-defined color codes for the uses based on the type of work and the site you are present at. These standard guidelines are made by some of the agencies which are being followed by several organizations today. It makes it easier and more organized to know which helmet is suitable for the kind of work you are doing.

Below are the color codes mandates for the safety helmets and their uses

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1. Yellow color safety helmets

This color code is for the earth moving operators or heavy-duty workers and laborer’s who are working on construction sites.

2.Blue color safety helmets

This color is preferred by the electricians or technical workers like carpenters and interim workers.

3.Brown color safety helmets

This is used by welders or people with high heat working areas.

4.Green color safety helmets

This shade is worn by the safety inspectors on-site and some new trainees and officers also prefer green color helmets.

5. White color safety helmets

This is the basic color that catches an eye amongst all the other colors. Hence, these color helmets are used by supervisors, architects, engineers, and managers.

6.Red color safety helmets

This color is used by firefighters and emergency trainees.

7.Grey color safety helmets

These are issued to site visitors on the worksite.

8.Pink safety helmets –

These are preferred by female workers. In some companies, these are kept as an additional helmet.

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Many companies and industries have kept the criteria of color codes for safety helmets. No one will put you in jail or ask for a fine for not following them, in the eye of the law and rule. Yet these color codes are made for the benefit and safety of the people working on site.  There are various benefits of maintaining color codes of safety helmets.



Color codes help to identify the position of the employee wearing the gives a clear idea of what task a person is attending. It helps a person in case of emergency or query, color sorts out who to look for.  Managers can also easily identify which group of workers is working on which site.

Fast and smooth working process-

Each person following the color code for safety helmets gets a clear picture of which task they must perform. Also, there is a better differentiation for the co-workers to know which team is running which process. So, it makes the work clear and smooth for working. Although, color plays an important role but only looking for the color is not enough. There are various key points to consider while you are buying a safety helmet.

Some of them are –

Quality check-

The safety helmet should have the quality mark for ensuring proper safety.  They are made of different materials. You should always check the quality of the helmet according to the task you have to perform on-site. As if you just look for the color it may still be wrong for you if the quality is not up to the mark. Therefore, it is always suggested to look for the quality and material before looking for the color code.