I have a tub surround to the ceiling that I would like to remove the grout. How long would you think it would take using this blade. Tiles are 3x3.

Not enough information. Is the surround a single piece that' s grouted at the tub, is it made of large tiles, is it made of small tiles...? This blade is very efficient, but the time is going to depend on how many linear feet of grout you have to remove.A more relevant question is how many feet of grout will the blade remove before it wears out. That answer is also dependent on your situation. Is the grout sanded or unsanded? How wide is the joint, 1/8" , 1/4" , wider? (This blade will not work on anything narrower than 1/8".) How old is the grout?Sanded grout will generally take longer and wear out the blade faster. Older grout is frequently harder than newer grout.And note that the blade is rounded, so if you need to get into corners you' ll need another kind of blade for that, something like a DEWALT DWA4242 Diamond Flush Cut Oscillating Blade.On average, I' d say that one blade will do the line between tub and surround before it wears out. At the price, get a second blade and swap out as soon as you notice your progress slowing. If you use the blade past its intended life, you may get overheating marks on a porcelain tub or damage to a Corean tub. Ditto for " don't push". If you push, the blade will wear out faster and you WILL get overheating.

It depends on the brick, but it should at least make a line of some depth in most brick, especially 'clay' brick. If you need to cut refractory or porcelain coated,or just plain porcelain brick, it ought to work, but an ablating abrasive wheel would be a better choice, note that either will put out a goodly cloud of dust but the wheel will put out more and finer dust. Use a mask and cross ventilation for either process. A diamond blade will likely be a better choice, last a bit longer and cut more cleanly. Same warning about the dust!

Will this cut into concrete ? If so, what depth ?

No, this blade is recommended for grout removal.

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⚡ Cut through grout like a pro—fast, flawless, and fuss-free!

BUILT TO LAST - Industrial-grade carbide ensures long-lasting durability under heavy use.
READY OUT OF THE BOX - One-size blade with universal fit—get straight to work without delays.
EFFORTLESS EFFICIENCY - Lightweight design (0.28g) reduces fatigue during extended projects.
SEAMLESS COMPATIBILITY - Fits all major oscillating tools—no adapters needed, no hassle.
PRECISION GROUT REMOVAL - Carbide edge engineered for fast, clean grout cutting every time.

The DEWALT DWA4220 oscillating tool blade is a one-size, carbide-edged accessory designed specifically for grout removal. Featuring a universal fit compatible with all major oscillating tools, it requires no adapters, enabling quick and efficient cutting. Lightweight and industrial-grade, this blade delivers precision and durability for professional-grade results.

Reviews

S**.

Could not use it, wrong fitting

Check exactly what blades you need, this one does not fit Bosch machines (Starlock). Needs improvement on description.

8.09.2021

W**A

Great for Epoxy grout removal

Tool did the job for 4mm epoxy grout which is hard to remove. Took a bit of work but does the job great. Needed 3 blades for an area of 40sqm of tiles.

31.05.2022

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Manufacturer	DEWALT
Part number	DWA4220
Item Weight	0.28 g
Product Dimensions	12.22 x 2.16 x 14.61 cm; 0.28 g
Item model number	DWA4220
Size	One Size
Color	Multi
Style	Industrial
Finish	Brushed
Material	Carbide
Pattern	Solid
Shape	Rectangular
Item Package Quantity	1
Number Of Pieces	1
Included components	Dewalt - DWA4220
Batteries Included?	No
Batteries Required?	No

DEWALTOscillating Tool Blade for Grout Removal, Fast Cutting, Carbide (DWA4220), One Size

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