1 / 7CRAFTSMAN CMCS405B V20 Brushless 4.5 in. Circular Saw
The CRAFTSMAN V20 CMCS405B is a brushless, battery-powered circular saw with a 4.5-inch blade, listed at up to 4,500 no-load RPM. It is sold as a tool only, so the battery and charger are separate purchases.
At a glance
- Brushless motor is rated for up to 4,500 no-load RPM.
- The listing describes a 4.5-inch blade for cutting 2x material at 90° and 1x at 45°.
- Front dust port, sliding rip fence and auxiliary handle are listed features.
- Electronic blade brake and on-board blade-key storage are claimed.
Reference price: $159.00
Price checked: Nov 13, 2026
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Pros and cons
Pros
- Compact 4.5-inch blade format is suited to smaller wood-cutting tasks and tighter spaces.
- Rip fence and auxiliary handle offer guidance and an additional grip point.
- Electronic blade brake and built-in blade-key storage add practical operating conveniences.
Cons
- Battery and charger are sold separately, so this tool-only listing does not provide a complete cordless setup.
Technical specifications
17 specifications| Brand | CRAFTSMAN |
|---|---|
| Model | CMCS405B |
| Power configuration | Battery Powered |
|---|---|
| Voltage | 20 volts |
| No-load speed | 4500 rpm |
| Blade teeth | 24 |
| Blade size | 4.5 in. |
|---|---|
| Listed cutting angle | 45 degrees |
| Blade shape | Round |
| Recommended surface | Wood |
| Blade material | Alloy Steel |
| Special features | Bevel Capability, Brake, Brushless, Lightweight |
|---|---|
| Handle material | Plastic, Aluminum |
| Colour | Black, Red |
| Specification met | CE, OSHA |
| Dimensions listed | 46.9L x 14W x 17.1H centimetres |
|---|---|
| Weight listed | 3.09 kg |
What to know before buying
Listing details to confirm
The listing identifies this as a 20-volt tool, while its battery disclaimer says 20 volts is maximum initial voltage and nominal voltage is 18 volts. Its listed 45-degree angle matches the stated bevel-cut capability, but the specification table does not clarify cutting capacity beyond the description's 1x-at-45° and 2x-at-90° claims. Confirm that the included saw alone meets your needs, since the battery and charger are sold separately.
What’s in the box
Included- CMCS405 V20 brushless RP 4.5 in. circular saw, quantity 1
Who is it for?
A good fit for
- CRAFTSMAN V20 owners who already have a compatible battery and charger.
- DIY users making wood cuts where a compact 4.5-inch circular saw and listed bevel capability suit the work.
- Buyers who value a rip fence, auxiliary handle and electronic blade brake.
Less suited to
- Buyers who need a battery and charger included in the same package.
- Buyers needing a saw explicitly specified here for materials other than wood or larger-blade cutting.
Customer reviews on Amazon
- 5 stars
82% 82% - 4 stars
12% 12% - 3 stars
2% 2% - 2 stars
0% 0% - 1 star
4% 4%
Customer feedback describes the saw as easy to control and useful for house projects, with positive comments about quality and performance. Those reported impressions are relevant to its intended DIY role, while the listed 4.5-inch blade and wood recommendation define a narrower scope than a general-purpose saw. Aggregate ratings are mostly five-star, but a smaller one-star share shows that experiences are not uniformly positive. The available feedback does not explain the reasons behind the ratings.
Positive themes
- Feedback describes good quality and useful performance for house projects.
- Customers are reported to appreciate ease of use and control.
Frequently asked questions
Does this listing include a battery and charger?
No. The product description says the battery and charger are sold separately, and the title identifies it as tool only.
What cutting capacity does the listing describe?
It says the 4.5-inch blade can cut 2x material at 90° and 1x material at 45°.
What features are listed for guided or controlled cutting?
The listing names an auxiliary handle, sliding rip fence, front dust port and electronic blade brake.
What does the voltage information mean?
The listing gives 20 volts, while its disclaimer states that 20 volts is maximum initial battery voltage and nominal voltage is 18 volts.
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