Best 4 1/2 Angle Grinder of 2020 Complete Reviews with Comparisons

By Tool Scout | Angle Grinder Reviews

Best 4 1/2 Angle Grinder

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When it’s time to make your artwork look professional or to polish your patchwork around the house, nothing beats using the best 4 1/2 angle grinder you can afford. This handheld tool is so versatile and can handle so many projects that it should be a must-have tool in any household.

But, there’s more than one model out there. This means that finding the right match might not be as easy as you might think, at least if you’re concerned about more than just pricing. Take a look at our top angle grinders to understand what we’re talking about.

Comparison Chart

WEN 94475 7.5-Amp 4-1/2-Inch Angle Grinder 

Metabo WP9-115 Quick 8.5 Amp 10,500 rpm Angle Grinder 

Bosch GWS10-45P Angle Grinder with Paddle Switch, 4-1/2″

4-1/2-Inch Angle Grinder 6.0-Amp with 3 Abrasive Wheels 

Angle Grinder, GALAX PRO 6 Amp Grinder Tool 

Best 4 1/2 Angle Grinder Reviews

WEN 94475 7.5A Angle Grinder

Starting off the list strong, the WEN 94475 has a bunch of necessary attachments, a strong motor, and it’s a very lightweight tool. It also comes at a very good price point, which makes it all the more attractive.


The WEN 94475 angle grinder has plenty of power for a lightweight tool. Its 7.5A motor is powerful and reliable. The motor can generate up to 11,000 RPM under no load. For most polishing and sanding jobs, this will be ideal.

What’s even better is that this model can accommodate 5/8” and 7/8” grinding wheels, thanks to the design of the arbor adapter. Of course, that’s not all. Where the WEN 94475 truly shines is in the comfort and ease of use department.

First of all, the grinder comes with an auxiliary handle. This means that you can use it on either side while also adding some extra balance. The 4-lb. body should limit fatigue and so will the ergonomic grips on both the standard and auxiliary handle.

Secondly, the unit has a smooth and silent operation when compared to most similarly priced angle grinders. You might also appreciate the fact that there’s also a lock-on switch on the side which can keep the disc rotating continuously for as long as you need it.

Another cool bonus are the three included grinding discs. They are 4-1/2 discs rated for speeds of up to 13,200RPM. That being said, it’s always nice to get some backup disks so you can get started on working right away.

And, to sweeten the pot further, WEN also ads a carry case and a wrench so that you can replace discs faster and safer.


  • Accommodates two wheel sizes
  • Comes with carry case and multiple discs
  • Lightweight
  • Good performance


  • Louder than most angle grinders

Metabo WP9-115 Quick 8.5A 4-1/2 Angle Grinder

The Metabo WP9-115 has one of the most powerful motors in its class. It’s a 4-1/2 angle grinder ideal for material removal, polishing, and even cutting through wood, tile, or metal, provided you’re using the appropriate discs.


The WP9-115 comes with a bunch of features and functions unique to Metabo. One of the most important features is the Metabo S-Automatic safety feature. This is basically a safety slip clutch which improves operational control and reduces the risk of kickback. Something you’re likely to run into when cutting through high-density wood.

Another cool feature is the Metabo Quick System. This is the disc change system which renders the classic wrench tool obsolete. All you’ll have to do is press a button to remove the disc.

Durability is another important hallmark. The build quality is superior or at least close to that many mid to premium-priced 4-1/2 angle drivers. The durability is also noticeable when it comes to the motor, which has roughly 20% more overload capacity.

A dead-man paddle switch is also part of the design. This facilitates a quick shutdown of the motor if you release the switch. One more thing that might interest you is the fact that the WP9-115 can run on both AC and DC.

This does a great deal for both portability and overall utility. And, the fact that the motor boasts an optimized airflow and cooler operating temperatures makes the WP9-115 great to use in harsh working and environmental conditions.


  • AC/DC operation
  • Optimized airflow
  • High overload capacity
  • Multiple safety features
  • Tool-less disc change system


  • Quite expensive

Bosch GWS 10-45P 4-1/2” Angle Grinder

The Bosch GWS 10-45P checks all the important boxes for a high-quality angle grinder and then some. Along with the high standard of quality that’s synonymous with Bosch, you can also enjoy a very well-balanced angle grinder that produces limited vibrations.


It’s not often that you can find an angle grinder best suited for both cutting and polishing intricate pieces or hardware or art. The GWS 10-45P delivers on both fronts, mostly due to its vibration control side handle. This reduces the amount of feedback and gives you a very comfortable grip to work with too.

The handle can also be used in two different positions which should let you use the GWS 10-45P with a wider range of techniques. But the versatility doesn’t stop there. The motor is a powerful 10A motor with impressive power.

It’s capable of delivering 11,500 RPM which is nothing to scoff at. The motor also comes with direct-motor cooling, which increases the longevity and overload resistance. Carbon brushes also help improve the durability.

A paddle switch is included, which makes the operation a lot easier and safe. Another cool feature is the Service Minder feature that is present in most Bosch angle grinders. This stops the tool from working if something’s off and maintenance is required.

Of course, ease of use and superior durability are just two of the things that separate the GWS 10-45P from the crowd. What makes it special is its ability to handle all-day operation in your garage workshop, machinery manufacturing, or at the construction or contractor site.


  • High power and speed
  • Service Minder feature
  • Metal gear case
  • Tool-less blade guard
  • Spindle lock


  • Might be a bit too expensive for hobbyists

Masterworks MW589 6A 4-1/2” Angle Grinder

If you’re budget-constrained and you’re in the market for something more affordable, then the Masterworks MW589 4-1/2” angle grinder might be a better fit for you. It comes with plenty of accessories, a decent amount of power for cutting, grinding, and polishing, and a comfortable design.


While the affordable pricing may be the main highlight for many consumers, there’s more to the MW589 than just that. For instance, the side handle does a good job of reducing the amount of vibrations even at high speeds.

The accessories include a wrench, auxiliary handle, carbon brush, and three abrasive wheels. Both the cutting and the grinding discs are fairly durable, so they should keep you busy for a while.

A spindle lock is available which will facilitate easier disc changes as well as more control and precision while grinding away excess welding. The auxiliary handle can be placed on either side or on top. As with all 3-position handle designs, this will help you use a wider range of techniques and work on hard-to-reach areas.

While the 6A motor may not have the most powerful out there, it can still produce up to 12,000 RPM. This will be helpful for sanding and polishing projects that require a 4-1/2” angle grinder.


  • Affordable
  • 3 discs included
  • 12,000 RPM
  • 3-position handle
  • Spindle lock


  • Average power

Galax Pro 6A 4-1/2” Angle Grinder

Galax Pro also offers an affordable 4-1/2” angle grinder which keeps the competition interesting. This tool comes with multiple accessories and a good amount of speed and power. It also helps that the build quality is good even though the price tag might not reflect it.


This Galax Pro angle grinder can be used for metal cutting, grinding, as well as on projects involving wood, stone, or tile. It does a particularly fine job at sanding and removing rust due to its high 12,000 RPM speed.

The list of accessories includes a spanner wrench, a protective guard, a cutting wheel, and a grinding wheel. The convenience of using this Galax Pro 6A angle grinder comes mostly from its narrow build, light weight, and ergonomic handle.

That being said, some users may be more impressed by the durability of this affordable tool. Galax Pro uses an innovative venting system that protects the motor from overheating, a situation that might occur in grinding and cutting applications.

All in all, this is a very good alternative for someone that can’t afford a powerful do-it-all angle grinder. And, it should be able to handle even more difficult jobs thanks to the unique duct design and reliable cooling.


  • Affordable
  • Multiple accessories included
  • Unique venting system
  • 3-position handle
  • 12,000 RPM


  • Unknown power tool brand


What do you think is the best 4 1/2 angle grinder for your projects? We recommend the WEN 94475 7.5A angle driver for anyone looking to tackle a wide range of tasks. It’s ideal for a range of grinding, cutting, and sanding techniques at a low cost.

Of course, each angle grinder has its pros and cons. This means that some may benefit more from other models.

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