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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 3 left in stock, order soon!
Arrives
Nov 17 – Nov 19
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At a glance
- Condition
- New
- Model
- CMCS405B
- Dimensions
- 18.47"L x 5.51"W x 6.73"H
- Weight
- 6.8 lb
- Color
- Black, Red
- Blade Material
- Alloy Steel
- Surface Recommendation
- Wood
- In the box
- (1) CMCS405B Brushless RP Circular Saw
Features 7
- Brushless motor: up to 4500 no-load rpm
- Ease of use: auxiliary handle allows for ease of use
- Dust control feature: on-board front dust port
- Accuracy: sliding rip fence improves accuracy
- Bevel: bevel at 45 to cut 1x dimensional lumber
- Safety: electronic blade brake stops blade quickly
- Convenience: on-board blade key storage for quick blade change
Description
Step up to More Runtime and Better Performance with the V20BRUSHLESS RP Cordless 4-1/2 in. Circular Saw. Its lightweight design makes it perfect for tight spaces and extended-reach applications. The brushless motor delivers up to 4,500 no-load RPM for efficient cutting through various materials. With a 4-1/2” blade, you can cut 2x material at 90° and 1x at 45°. The auxiliary handle enables one-handed operation and easy use. (Battery and Charger sold separately).
Specs 21
| Brand | CRAFTSMAN |
|---|---|
| Color | Black, Red |
| Blade Material | Alloy Steel |
| Surface Recommendation | Wood |
| Power Source | Battery Powered |
| Other Special Features of the Product | Bevel Capability, Brake, Brushless, Lightweight |
| Voltage | 20 volts |
| Speed | 4500 rpm |
| Cutting Angle | 45 degrees |
| Blade Shape | Round |
| Warranty Type | limited warranty |
| Item Dimensions L x W x H | 18.47"L x 5.51"W x 6.73"H |
| Item Weight | 6.8 pounds |
| Handle Material | Plastic, Aluminum |
| Brand Name | CRAFTSMAN |
| Model Number | CMCS405B |
| Number of Items | 1 |
| UPC | 885911913317 |
| Item Type Name | Circular Saw |
| Manufacturer | CRAFTSMAN |
| Manufacturer Part Number | CMCS405B |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 17 – Nov 19
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Love it for counter tops
Little guy is amazing I use it mostly for cutting countertops it's super handy used it for awhile now it's perfect little guy.
Reviewed in the United States on July 15, 2026 by haunsa
Tiny Beast of a Saw—Built Like a Tank, Cuts Like a Surgeon
The Craftsman V20 4-1/2” Cordless Circular Saw might be small, but don’t let its size fool you—it’s basically a caffeinated beaver with a power supply. I bought it to replace my DeWalt, and now the DeWalt just sits in the corner wondering what it did wrong. This thing has power. It chews through wood, vinyl, metal (with the proper blade), even the mystery material behind my old baseboards, without hesitation. It’s lightweight, so you won’t feel like you just arm-wrestled a grizzly after a few cuts, and the 4Ah battery lasts long enough for me to start a project, get distracted, and then come back hours later and finish it—still on the same charge. And yes, I’ve dropped it off the workbench more than once. Still works. I think this thing might actually be part cockroach. Why I Love It (and You Might Too): Power That Surprises You: It’s compact, but it cuts like it’s trying to prove something to a full-size saw. Featherweight Fighter: Light, easy to handle, and great for overhead or awkward-angle cuts—aka real life. Beginner-Approved: Feels good in the hand, easy to use, and makes even my “eyeballed” cuts look decent. Great Visibility: LED light plus solid sightlines mean you don’t need X-ray vision to follow your cut line. Safety That Saves Fingers: The automatic blade shut-off is like a guardian angel for your thumbs. Brushless & Brag-Worthy: Quiet, efficient, and surprisingly refined—basically the James Bond of circular saws. Bottom line: It’s tough, it’s smart, and it works like a champ even after gravity tests. If you’re looking for a compact saw that acts like it’s twice its size, this is your guy. Just don’t let your other tools see it—they might get jealous.
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Reviewed in the United States on July 30, 2025 by Tammy
10/10 stars ⭐️
Great saw , not your average craftsman tool - better than Milwaukee on this tool for sure 😎
Reviewed in the United States on July 11, 2026 by Vincent
easier to use than a regular sized circular saw
Love it! it feels less cumbersome than a full size circular saw. I wish I had bought it sooner to rip down plywood and smaller dimensional lumber
Reviewed in the United States on February 23, 2026 by Lil Miss Book Worm
It works well
Does what it is supposed to.
Reviewed in the United States on October 13, 2026 by Kindle Customer
Easy to control and light weight
Perfect saw to cut plywood or 2x lumbers. The saw is easy to control and light when compared to the full size circular saw. On the flip side, the saw consumed the battery pretty fast. You will see the battery indicator drop by one light after two long plywood cut. I also miss the led light that is standard with my Makita saw. Overall, it is a good saw.
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Reviewed in the United States on March 6, 2026 by Stanley C. Hui
Strong motor.
A little sub goal is to have as many of your power tools work from the same battery. The V 20 now powers all my portables….. finally.
Reviewed in the United States on September 5, 2026 by Robert J. Houlihan
Super handy
Love grabbing this when making small cuts on 1x boards, and i even use it to rip. Very smooth to operate.
Reviewed in the United States on July 15, 2026 by Scott Fann