Step up to More Runtime and Better Performance‡ with the V20Brushless RP Cordless 4-1/2 in. Circular Saw. This tool-only configuration is intended for buyers who already own a compatible V20 battery and charger.
Is the CMCS405B compatible with CRAFTSMAN V20 batteries, and what size pack makes the most sense?
Yes. The CMCS405B runs on the V20 platform. Smaller packs keep the tool lighter, while 4Ah and 6Ah packs are better when you want longer runtime or you are driving a higher-draw tool.
When should you choose the CMCS405B as sold versus another package option?
Because the CMCS405B is tool-only, it is the better value if you already own a charger and enough V20 batteries.
What do the key specs on the CMCS405B mean in actual use?
The headline numbers are 4500 RPM, 5 in. blade. Brushless motor construction affects efficiency and heat.
How much does the CMCS405B's brushless motor matter to a buyer?
A brushless CMCS405B is the better buy if you use the tool often, want stronger efficiency from each charge, and expect longer service life under repeated load.
What kind of buyer is the CMCS405B aimed at?
The CMCS405B is for someone choosing around its actual numbers and package contents, not just the brand name: CRAFTSMAN V20 BRUSHLESS RP Cordless 4.5-Inch Circular Saw (Tool Only) with 4500 RPM, 5 in. blade.
# CRAFTSMAN V20 BRUSHLESS RP Cordless 4.5-Inch Circular Saw (Tool Only) **Model:** `CMCS405B` **Brand:** CRAFTSMAN **Category:** Circular Saw > Step up to More Runtime and Better Performance‡ with the V20Brushless RP Cordless 4-1/2 in. Circular Saw. This tool-only configuration is intended for buyers who already own a compatible V20 battery and charger. ## Specifications | Attribute | Value | |---|---| | Product Type | Circular Saw | | Voltage (V) | 20 | | Cordless / Corded | Cordless | | Power Source | Battery | | Motor Type | Brushless | | Tool Only | Yes | | Batteries Included | 0 | | Charger Included | No | | Battery Platform | V20 | | Barcode (UPC) | 885911913317 | | Country of Origin | China | | Warranty | 3-year limited | | Max Speed (RPM) | 4,500 | | Variable Speed | No | | Hammer Function | No | | Blade Diameter (in.) | 5 | | No Load Rpm | 4,500 | ## What's Included - (1) V20 BRUSHLESS RP Cordless 4.5-Inch Circular Saw (Tool Only) - Battery and charger sold separately Source: https://www.jaspecs.com/craftsman/circular-saw/cmcs405b-brushless-rp-cordless-4-5-inch-circular-saw-tool-only/