Milwaukee 6538-21 15.0 Amp Super Sawzall Reciprocating Saw

Power tools are simple, but greatest, the compound part of technological advancement. One of my favorite power tools is the reciprocating saw. I work a the compound, doing various kinds of jobs on a daily basis. This tool helps in trimming, pruning, and demolitions and in solving numerous other tasks.

I’ve owned several models since I bought my first home.I change them when there is a need. I’m currently using the Milwaukee 6538-21 15.0 Amp Super Sawzall Reciprocating Saw. It is a great tool that anyone deserves to have in their home.

This guide explains how the tool works and performs. Read this review and see if it’s the reciprocating saw that you need for your larger cutting projects.

Milwaukee 6538-21 15.0 Amp Super Sawzall Feature

Superior Quality Design

When you hold this machine in your hands, even before you turn it on, you can feel how superior it is. It looks and feels superior. Then when you turn it on, it performs like a super quality machine. The saw is designed for anyone in need of a quality saw for heavy cuttings around their home. If you are used to using reciprocating saws that are inferior to Milwaukee 6538-21, this machine will surprise you.

Smooth Controlled Cutting Speed

The saw comes with variable speed trigger that is used to control the speed of the reciprocating saw’s stroke by using a speed control. Different materials call for different cutting speeds if perfection is to be achieved every time. That’s why you need a saw whose cutting speed can be adjusted to provide the smoothest cut on different materials. You can increase the speed of the reciprocating saw to its maximum capacity when you cut dense and large materials.

Constant Power Technology

The company incorporated various innovative features into the saw, and constant power technology is one of them. This is a relatively new technology designed to ensure the tool has a constant power supply throughout the cutting project. It ensures that the saw maintains a constant load for superior cutting performance. Because of this technology, you can cut through various kinds of materials at the same speed, hence reducing chances of the blade breaking or lockup.

Patented Counter-Balance Mechanism

The saw features patented counterbalance mechanism. This feature enhances smooth running of the saw and minimizes vibrations when the tool is functioning. This mechanism helps users to balance the tool well when cutting materials.

There is a huge difference between a tool that has no counter balance and that which has the feature. Compare the saw with a model that doesn’t have this feature, and you will understand why you can do much more work with this saw before feeling tired.

Patented Gear-Protecting Clutch

This is what protects the gears and enhance motor life. This feature absorbs the high impact forces caused by sudden blade locks-ups. It helps you perform the task faster without having to change blades in between. The mechanism also makes sure that the tool remains in the best working condition. It saves you money as a result because you won’t have to replace the blades or the expensive motor.


  • A powerful 15 amp motor
  • ​Industry’s highest overload protection
  • ​Minimum vibration
  • Extended gear and motor life
  • Fastest and most durable reciprocating saw


  • It’s somehow bulky
  • Requires heavy duty extension cord

Frequently Asked Questions

Q: How long can I use this saw constantly before it heats up?

A: I don’t know how long but I can assure you that this reciprocating saw holds up well under constant and consistent use.

Q: How easy is it to change blades?

A: It’s easy and fast since you don’t need tools to change blades

Q: Does it slow down when the blade engages the material?

A: It maintains constant speed all through the cutting

Final Verdict

As you can see, the Milwaukee 6538-21 isn’t your ordinary reciprocating saw. The moment you use it for the first time, you’ll understand better what I mean when I say this machine can tackle almost every heavy cutting task around the home. It changed the way I approach every task in my home. I can use it for demolition, trimming of trees or bushes, among other cutting projects.

Garry Harris

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