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Spec sheet

4-1/2" Angle Grinders compared

A 4-1/2" angle grinder cuts metal, rebar, tile and bolts, and grinds or wire-brushes rust and welds. Here is every major brand at the same tier, side by side, from each brand's own spec pages.

Manufacturer-published specs. Not our tests. Copied from each brand's own product pages, accessed 2026-10-29. We never rank them or pick a winner from specs.

The store buttons under each model are affiliate links: I may earn a commission at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Specs are never changed because of a commission.

Entry / DIY

Weekend projects, repairs around the house, a few jobs a month. Lighter and lower cost.

Pro / flagship

Daily use, bigger bits and blades, tougher material. More power, usually more weight and cost.

Pick your battery first

Batteries only fit tools from their own brand line. If you already own batteries, compare inside that brand first.

Entry / DIY brushless

Ryobi ONE+ HP, Craftsman V20 brushless, Ridgid 18V brushless, DeWalt ATOMIC/XR, Milwaukee M18 brushless, Makita 18V LXT brushless, Bosch 18V brushless. Bare tool, no battery.

Entry / DIY brushless: 4-1/2" Angle Grinders. Manufacturer-published specs. Not our tests.
Brand / modelWheel sizeNo-load speed (RPM)Electric brakeWeight (lb)Length (in)
Bosch GWS18V-8N [7]18V Brushless 4-1/2" Angle Grinder with Slide SwitchAmazonHome DepotLowe's4-1/2 in11,000not published3.6 lbbasis not stated11.8 in
Craftsman CMCG450B [9]V20 Brushless 4.5" Small Angle GrinderAmazonHome DepotLowe's4.5 in11,000not published5.2 lb ("Assembled Product Weight")basis not stated14.25 in ("Assembled Product Length")basis not stated
DeWalt DCG407B [3]20V MAX Brushless 4-1/2" Slide-Switch GrinderAmazonHome DepotLowe's4-1/2 in (accepts 4-5 in wheels)product title + featureup to 9,000not published4.87 lb ("Assembled Product Weight")basis not stated13.0 in ("Assembled Product Length")basis not stated
Makita XAG04Z [5]18V LXT Brushless 4-1/2" / 5" Cut-Off/Angle GrinderAmazonHome DepotLowe's4-1/2 in / 5 in (spec table lists 5 in)product title8,500No5.6 lb with battery14-1/4 in overall
Milwaukee 2686-20 [1]M18 Brushless 4-1/2" / 5" Cut-Off GrinderAmazonHome DepotLowe's4-1/2 in / 5 inproduct title11,000product overview textnot published3 lb (tool only); 3.6 lb listed as "Weight"12.25 in
Ridgid R86047B [11]18V Brushless 4-1/2" Paddle Switch Angle GrinderAmazonHome DepotLowe's4-1/2 inproduct title9,000 maxnot published5 lb ("Product Weight")basis not statednot published
Ryobi PBLAG01B [12]18V ONE+ HP Brushless 4-1/2" Angle Grinder/Cut-Off ToolAmazonHome DepotLowe's4-1/2 in9,200not publishednot publishednot published

Pro / flagship

Milwaukee M18 FUEL, DeWalt XR / FLEXVOLT ADVANTAGE, Makita LXT flagship, Bosch PROFACTOR, Ridgid top current model, Ryobi HP top model, Craftsman V20 RP. Bare tool, no battery.

Pro / flagship: 4-1/2" Angle Grinders. Manufacturer-published specs. Not our tests.
Brand / modelWheel sizeNo-load speed (RPM)Electric brakeWeight (lb)Length (in)
Bosch GWS18V-10PN [8]18V Brushless 4-1/2" - 5" Angle Grinder with Paddle SwitchAmazonHome DepotLowe's4-1/2 in - 5 in9,000Yes (brake system)feature bullet4.3 lbbasis not stated12.5 in
Craftsman CMCG451B [10]V20 BRUSHLESS RP 4-1/2" Small Angle GrinderAmazonHome DepotLowe's4.5 in8,500not published5.2 lb ("Assembled Product Weight")basis not stated14.4 in ("Assembled Product Length")basis not stated
DeWalt DCG413B [4]20V MAX XR 4-1/2" Paddle Switch Grinder with KICKBACK BRAKEAmazonHome DepotLowe's4.5 in9,000Yes (stops wheel in 2 s or less on average)feature bullet4.6 lb ("Assembled Product Weight")basis not stated12.9 in ("Assembled Product Length")basis not stated
Makita XAG20Z [6]18V LXT Brushless 4-1/2" / 5" Paddle Switch Grinder with Electric BrakeAmazonHome DepotLowe's4-1/2 in / 5 in (spec table lists 5 in)product title3,000-8,500 (variable)Yes5.7 lb with battery15 in overall
Milwaukee 2880-20 [2]M18 FUEL 4-1/2" / 5" Grinder, Paddle Switch, No-LockAmazonHome DepotLowe's4-1/2 in / 5 inproduct title8,500feature bulletYes (RAPIDSTOP)feature bullet3.1 lb (tool only); 5.5 lb with battery12.71 in
RidgidNo current model in this tierRidgid no longer lists MAX OCTANE tools on powertools.ridgid.com, and there's no step-up model in this category.
Ryobi PBLAG02B [13]18V ONE+ HP Brushless 4-1/2" Angle Grinder/Cut-Off Tool (newer model)AmazonHome DepotLowe's4-1/2 in9,000not published3.83 lbbasis not statednot published

Charts by spec

Manufacturer-published specs. Not our tests. Bars are in fixed alphabetical brand order. There's no ranking and no winner.

No-load speed (RPM)

No-load speed (RPM): Entry / DIY brushlessManufacturer-published specs. Not our tests.
Bosch GWS18V-8N: 11,000 RPM; Craftsman CMCG450B: 11,000 RPM; DeWalt DCG407B: 9,000 RPM; Makita XAG04Z: 8,500 RPM; Milwaukee 2686-20: 11,000 RPM; Ridgid R86047B: 9,000 RPM; Ryobi PBLAG01B: 9,200 RPM Bosch GWS18V-8N 11,000 RPM Craftsman CMCG450B 11,000 RPM DeWalt DCG407B 9,000 RPM Makita XAG04Z 8,500 RPM Milwaukee 2686-20 11,000 RPM Ridgid R86047B 9,000 RPM Ryobi PBLAG01B 9,200 RPM
No-load speed (RPM): Pro / flagshipManufacturer-published specs. Not our tests.
Bosch GWS18V-10PN: 9,000 RPM; Craftsman CMCG451B: 8,500 RPM; DeWalt DCG413B: 9,000 RPM; Makita XAG20Z: 8,500 RPM; Milwaukee 2880-20: 8,500 RPM; Ryobi PBLAG02B: 9,000 RPM Bosch GWS18V-10PN 9,000 RPM Craftsman CMCG451B 8,500 RPM DeWalt DCG413B 9,000 RPM Makita XAG20Z 8,500 RPM Milwaukee 2880-20 8,500 RPM Ryobi PBLAG02B 9,000 RPM

Weight (lb)

Weight (lb): Entry / DIY brushlessManufacturer-published specs. Not our tests.
Bosch GWS18V-8N: 3.6 lb (basis n/s); Craftsman CMCG450B: 5.2 lb (basis n/s); DeWalt DCG407B: 4.87 lb (basis n/s); Makita XAG04Z: 5.6 lb (w/ battery); Milwaukee 2686-20: 3 lb (tool only); Ridgid R86047B: 5 lb (basis n/s) Bosch GWS18V-8N 3.6 lb basis n/s Craftsman CMCG450B 5.2 lb basis n/s DeWalt DCG407B 4.87 lb basis n/s Makita XAG04Z 5.6 lb w/ battery Milwaukee 2686-20 3 lb tool only Ridgid R86047B 5 lb basis n/s
Weight (lb): Pro / flagshipManufacturer-published specs. Not our tests.
Bosch GWS18V-10PN: 4.3 lb (basis n/s); Craftsman CMCG451B: 5.2 lb (basis n/s); DeWalt DCG413B: 4.6 lb (basis n/s); Makita XAG20Z: 5.7 lb (w/ battery); Milwaukee 2880-20: 3.1 lb (tool only); Ryobi PBLAG02B: 3.83 lb (basis n/s) Bosch GWS18V-10PN 4.3 lb basis n/s Craftsman CMCG451B 5.2 lb basis n/s DeWalt DCG413B 4.6 lb basis n/s Makita XAG20Z 5.7 lb w/ battery Milwaukee 2880-20 3.1 lb tool only Ryobi PBLAG02B 3.83 lb basis n/s

Brands publish weight on different bases: tool only, with a battery (which battery varies), or unstated ("Assembled Product Weight", "Product Weight"). Each bar is tagged with its basis. Only compare bars that carry the same tag.

Length (in)

Length (in): Entry / DIY brushlessManufacturer-published specs. Not our tests.
Bosch GWS18V-8N: 11.8 in ('Length' field); Makita XAG04Z: 14.25 in (overall); Milwaukee 2686-20: 12.25 in ('Length' field) Bosch GWS18V-8N 11.8 in 'Length' field Makita XAG04Z 14.25 in overall Milwaukee 2686-20 12.25 in 'Length' field
Length (in): Pro / flagshipManufacturer-published specs. Not our tests.
Bosch GWS18V-10PN: 12.5 in ('Length' field); Makita XAG20Z: 15 in (overall); Milwaukee 2880-20: 12.71 in ('Length' field) Bosch GWS18V-10PN 12.5 in 'Length' field Makita XAG20Z 15 in overall Milwaukee 2880-20 12.71 in 'Length' field

Length bases differ (overall length, tool-head length, or a plain 'Length' field). Each bar is tagged. Assembled or package-style dimensions aren't charted.

What the specs mean

No-load speed (RPM)

Wheel speed with no load. Every wheel lists a max RPM; never go over it.

Electric brake

Stops the wheel fast when you let go of the switch.

Wheel size

4-1/2" is the common home size; many also take 5" wheels.

How to read these tables

  • Values are copied as published. Nothing is estimated, averaged or converted. "not published" means the manufacturer page didn't list it. Bars are in fixed alphabetical brand order. There's no ranking and no winner.
  • Brands publish weight on different bases: tool only, with a battery (which battery varies), or unstated ("Assembled Product Weight", "Product Weight"). Each bar is tagged with its basis. Only compare bars that carry the same tag.
  • Length bases differ (overall length, tool-head length, or a plain 'Length' field). Each bar is tagged. Assembled or package-style dimensions aren't charted.
  • Grey text under a value shows where on the page it came from (if not the spec table), or that the brand doesn't say what the weight includes.

Keep learning

Brand pages with deals, manuals and warranty: DeWalt · Makita · Milwaukee · Ridgid · Ryobi

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Sources

All manufacturer pages, accessed 2026-10-29. No retailer data used. No prices shown. Specs change, so check the brand's page before you buy.

  1. Milwaukee 2686-20, M18 Brushless 4-1/2" / 5" Cut-Off Grinder: https://www.milwaukeetool.com/products/details/x/2686-20. Accessed 2026-10-29.
  2. Milwaukee 2880-20, M18 FUEL 4-1/2" / 5" Grinder, Paddle Switch, No-Lock: https://www.milwaukeetool.com/products/details/x/2880-20. Accessed 2026-10-29.
  3. DeWalt DCG407B, 20V MAX Brushless 4-1/2" Slide-Switch Grinder: https://www.dewalt.com/en-us/product/dcg407b/20v-max-brushless-cordless-4-12-slide-switch-grinder-tool-only. Accessed 2026-10-29.
  4. DeWalt DCG413B, 20V MAX XR 4-1/2" Paddle Switch Grinder with KICKBACK BRAKE: https://www.dewalt.com/en-us/product/dcg413b/20v-max-xr-4-12-paddle-switch-small-angle-grinder-kickback-brake-tool-only. Accessed 2026-10-29.
  5. Makita XAG04Z, 18V LXT Brushless 4-1/2" / 5" Cut-Off/Angle Grinder: https://www.makitatools.com/products/details/XAG04Z. Accessed 2026-10-29.
  6. Makita XAG20Z, 18V LXT Brushless 4-1/2" / 5" Paddle Switch Grinder with Electric Brake: https://www.makitatools.com/products/details/XAG20Z. Accessed 2026-10-29.
  7. Bosch GWS18V-8N, 18V Brushless 4-1/2" Angle Grinder with Slide Switch: https://www.boschtools.com/us/en/products/gws18v-8n-06019H901F. Accessed 2026-10-29.
  8. Bosch GWS18V-10PN, 18V Brushless 4-1/2" - 5" Angle Grinder with Paddle Switch: https://www.boschtools.com/us/en/products/gws18v-10pn-06019J411E. Accessed 2026-10-29. Note: Bosch's step-up 18V brushless grinder. Bosch has no PROFACTOR grinder in this 4-1/2" size.
  9. Craftsman CMCG450B, V20 Brushless 4.5" Small Angle Grinder: https://www.craftsman.com/en-us/product/cmcg450b/v20-brushless-cordless-45-small-angle-grinder-tool-only. Accessed 2026-10-29.
  10. Craftsman CMCG451B, V20 BRUSHLESS RP 4-1/2" Small Angle Grinder: https://www.craftsman.com/en-us/product/cmcg451b/v20-brushless-rp-cordless-4-12-small-angle-grinder-tool-only. Accessed 2026-10-29.
  11. Ridgid R86047B, 18V Brushless 4-1/2" Paddle Switch Angle Grinder: https://powertools.ridgid.com/products/648846085807. Accessed 2026-10-29.
  12. Ryobi PBLAG01B, 18V ONE+ HP Brushless 4-1/2" Angle Grinder/Cut-Off Tool: https://www.ryobitools.com/products/33287188048. Accessed 2026-10-29.
  13. Ryobi PBLAG02B, 18V ONE+ HP Brushless 4-1/2" Angle Grinder/Cut-Off Tool (newer model): https://www.ryobitools.com/products/33287225200. Accessed 2026-10-29.

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