How are Screwdrivers Sized?

How are Screwdrivers Sized

One of the most common types of tools found around the house is the screwdriver. Screwdrivers can be used for a variety of tasks and no house is complete without one. You can use them for so many activities and so many DIY projects around the home. With that being said, if you are in the market to buy a new one it can be quite difficult. The main reason for this is there are so many screwdrivers being sold, it can be hard to know which to purchase and which to stay away from.

Today we are going to be looking at the sizing for screwdrivers, so when you go into a store to purchase one, you can talk intelligently about what you need and not be stuck when it comes time to do the task at hand. Sizing can be complicated, but once you begin to understand it all, the easier it is going to be.

The sizing: How are Screwdrivers Sized?

In order to purchase the proper screwdriver for yourself, you need to understand how sizing works. The size willdirectly affect the screws you use, the task at hand, and whether you will buy that particular screwdriver or not. No matter what type of head you are using, whether it be the classic Phillips, a square, a diamond, etc., they usually have the same sizing outline.

Most of the time, heads on the screwdriver are sized by number rather than an actual measurement. This is going to make it a lot easier for anyone to figure it out. Usually, the numbers range between 0 to 24. That being said, there are several that are used in inches, such as flathead screwdriver bits, and these will fit the corresponding screw that has that same measurement. Many sizes can fit two types of screws as they can fit one tightly and one just a bit looser. For example, if you have a 0 Phillips head, it is able to fit the Phillips screws that are 0 and 1; if you have the 1 head it can fit 2 and 3, and so on.

While this may get confusing from time to time, and may be difficult to keep track of, we promise that eventually you will get it and it will become a lot easier to understand. Sometimes you may just have to test it out and see if it fits or not; it is more of a trial and error approach but you have to do what you have to do.

Other things to look for

While you may understand sizing now and have begun to know which screwdriver to buy and what size to buy, there are a lot of other things to consider before purchasing a screwdriver. Probably the most important aspect of purchasing any tool is the durability of the product. This is usually the case for whenever you buy something new. There is no point in buying a screwdriver that just is going to break within the first several months of owning it. These are usually cheaply priced at first, but in the end, will not be worth the hassle. This is whyyou should always purchase from brands that are reliable and that you know, whose products are made out of the highest quality.

Instead of just purchasing a manual screwdriver, something we encourage people to do is to purchase an electric screwdriver. One of the main reasons for this is that it will be a complete package. They come with various bits of all ends and sizes, so that your machine can work with a lot of various screw heads. This is going to save you from the pain of buying many individual ones and allow you to focus on just one task.

If you get an electric screwdriver, we encourage you to find one that is very versatile, meaning you can use it for a variety of tasks. These come with a lot of bits, and also additional features such as an LED light.


We wish you the best when it comes to purchasing your next screwdriver. Finding the right size is so important and we hope you can make an informed decision.