The most used, the most feared · review
The cheapest machine here with restart protection — the feature that stops a grinder starting by itself.
Where we come out Seventy dollars for the first of the three safety features. Worth the step up from the €46 machines.
Seventy dollars, 800 W — and the first machine on this page with protection against unintended restart.
Angle grinders are left plugged in. The switch gets locked on, the breaker trips, someone reconnects the extension lead — and a tool with a 125 mm (4.92 in) disc starts by itself, on a bench, on the floor, or in a hand that was not expecting it. Restart protection latches the switch off until it is deliberately cycled.
It costs the manufacturer very little and it is absent from the three cheaper machines on this page. If you buy one thing above the entry level, buy this.
Going from rest to 11,800 rpm instantly produces a reaction torque that twists the machine in your hand. Soft start ramps it over a fraction of a second — easier on your wrist, easier on the gears, and one less way to lose control of a running disc.
Epoxy-coated motor windings and a fully ball-bearing gearbox. Those are durability claims rather than performance ones, and they are the sort of detail that separates a professional line from a DIY one.
No brake — the disc coasts for several seconds after release — and no kickback detection. Both appear further down this page.
Power, speed, safety features, motor construction and part number come from the manufacturer’s published specification. Market availability was verified per market on the EAN.
| Power | 800 W |
|---|---|
| No-load speed | 11,800 rpm |
| Disc diameter | 125 mm (4.92 in) |
| Safety | Electronic soft start, switch protected against unintended restart |
| Motor | Epoxy-coated windings, fully ball-bearing gearbox |
| Part number | DWE4057-QS |
| Amazon reference | B01E85JYZE |
| EAN | 5035048633847 |
A grinder whose paddle or slide switch is locked on, plugged into a socket, will start the instant power returns — after a tripped breaker, an extension lead reconnected, or a site supply coming back. That means a live tool on a bench, on the floor, or in your hand before you are ready. The protection latches the switch off until you cycle it deliberately.
Both, and mostly safety. A grinder going from nothing to 11,800 rpm in an instant delivers a reaction torque that twists the body in your hand — enough to pull it off the work or out of a one-handed grip. Ramping the speed over a fraction of a second removes that jolt, and it is also easier on the gearbox.
7.5/ 10
Seventy dollars for the first of the three safety features. Worth the step up from the €46 machines.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on August 13, 2026.
Anyone who leaves tools plugged in — which is everyone, eventually
Here because the consumable states this machine by name.
Specifications: the manufacturer sheet for welding and metalworking machines and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
1,400 W · constant electronic · soft start · €100
The same 1,400 W as the Metabo beside it, with a soft start it does not have and a quick-change nut it does.
Best for: Steady, heavy grinding where the machine runs for minutes at a time
900 W · 2,800–11,000 rpm · speed preselection · €61
Variable speed at €61 — which matters because stainless, paint and thin sheet all want a slower disc than steel.
Best for: Mixed work — stainless, painted steel, thin sheet — where full speed is the wrong answer
720 W · 176 mm (6.93 in) grip · flat gear head · €46
The cheapest professional-line grinder here, bought for its 176 mm (6.93 in) grip and its flat head rather than its power.
Best for: Light dressing, deburring and short cuts, where the tool is picked up and put down all day
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
