Masterforce Boost 20V cordless angle grinder 2903

Masterforce Boost angle grinder

Masterforce has updated its line of exclusive Menards cordless tools with Boost technology – and an improved electronics and battery pack to improve performance. We got our hands on the Masterforce Boost angle grinder to see what that means for metalworking.


  • Much better performance than the brushed version
  • Kickback sensor
  • Electronic speed control (six positions)
  • Easy protection setting


Masterforce Boost angle grinder performance

This grinder has 9,000 RPM on the high end and a six speed selector that gives control all the way down to 3,500 on the low end. Sometimes the question arises why a variable speed is important at all. Not everyone needs it, but the option for better control and more precise material removal is nice.

Masterforce Boost angle grinder head

If you are familiar with the Masterforce range, you may find that this model and the brushed battery model both have the same maximum speed of 9,000 rpm. The big difference you’ll notice is how much better the Boost grinder holds up its revs when you apply pressure. Without question, it is capable of cutting, grinding, and polishing much faster.

As expected, this grinder also coped with normal grinding and polishing with no problems and even put on an impressive show cutting 1/4 inch mild steel panels.

We experienced a couple of binds as we got used to the amount of pressure we could put into the cuts, and the built-in kickback protection quickly stopped rotation. This kickback control is a nice feature on this model. We expect it with premium models, but not every high-quality brand uses it.

Our tests were all done with a 2.5Ah Boost 20V battery, which worked well overall and kept weight under control. However, combining it with Boost 5.0Ah or Boost 7.5Ah is the way to go if you have a lot of work to do with this tool.

Design notes for Masterforce Boost angle grinders


To me, the Masterforce Boost angle grinder feels solid in my medium-sized hands. The rubber overmolded handle is about 1.5 inches wide and 2.25 inches thick, so it’s definitely manageable even if your hands are a little smaller.

We really like that Masterforce adds a top handle position that matches its left and right positions to make vertical cutting and sanding easier. The side handle itself has a vibration reducing design with an isolated section to dampen vibrations before they reach your hand.

Masterforce Boost Angle Grinder Top Handle


Masterforce opts for a paddle switch as opposed to a slide switch. Some brands offer both styles, but this is the only option for this version.

Masterforce Boost angle grinder trigger

On guard

Since this 20v sander can handle both 4 1/2 and 5 inch discs, Masterforce includes two steel guards for regular sanding discs and plastic covers for safer use with cutting discs.

As we would expect, the guard is adjustable so that the wheel locks into place at any desired working angle. To rotate the guard, pull the latch up, rotate the guard to the desired position, and lock it again.

As with most grinders, there is a wrench for changing the wheels. If you lose it or just don’t want to use it, watch this video for alternative ways to swap it out.

Masterforce Boost angle grinder price

You can pick up your very own Masterforce Boost cordless angle grinder for $ 129 from Menards as a mere tool. There is currently no kit option. If you don’t have a local store nearby, they offer a variety of shipping options online. Masterforce offers a 3-year manufacturer’s guarantee and a 90-day money-back guarantee on this angle grinder.

Masterforce cordless angle grinder comparison

20V wireless
20V boost brushless
Idle speed 9,000 rpm 3,500-9,000 rpm
Wheel diameter 4 1/2 in 4 1/2 or 5 inches.
engine Brushed Brushless
Empty weight 3.1 pounds 3.25 pounds
counter Slide paddle
price $ 69.99 $ 129.00

The bottom line

With the Boost cordless angle grinder, Masterforce has offered more than just better performance in the same package. Aside from the more powerful motor, the kickback control and speed selection are nice upgrades. Best of all, Masterforce is seriously considered in the prosumer class and is well worth a visit for the serious home improvement and budget-conscious professional.

Click here to explore the full Masterforce Boost lineup.

Masterforce Boost angle grinder specifications

  • Model: Masterforce 2903
  • Wheel diameter: 4 1/2 or 5 inches
  • Idle speed: 3500 – 9000 rpm
  • Mandrel diameter: 5/8 in.
  • Electronic cruise control: yes
  • Variable speed: yes
  • Removable side handle: Yes
  • Spindle lock: Yes
  • Weight: 4.31 pounds (bare), 5.38 pounds (with Boost 2.5Ah 20V battery)
  • Length: 12.25 inches.
  • Guarantee: 3 years
  • Price: $ 129.00 blank

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