I have a dewalt dwe402 4 1/2 inch. with this 3 by 5/8 inch work on it?

Yes. It will work on this grinder as it has a 5/8 spindle and its 3" diameter is less than the max 4/12". You'll have no problem.

Would this be good to remove bad roll on bed liner from a truck?

It is more common to use a chemical stripper and then various sanding stages. Using a knotted brush is going to load up and leave surface marks that will have to be sanded and then repainted to match the vehicles surface, which is where you will be with chemical stripping. Either way a whole painted bedliner removal is going to be a big job. If the bed was not prepped properly then the coating may come off easier.

Would this be suitable to removing a thin concrete overlay from a concrete driveway without removing too much of the underlying broom finish,?

Possibly. It would require a good touch. If the overlay was softer or not married into the brush coat too much. I would do a test patch.

Will this remove crystalized roofing tar and/or waterproofing? i plan on buy a skil 9296-01 to us with this brush to clean my concrete roof.

The DW4910 has not been tested for this application. It is ideal for industrial type work on metal.

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Description

⚡ Strip, shine, and dominate your workspace with Dewalt’s heavy-hitter brush!

VERSATILE COMPATIBILITY - Fits standard 5/8-11 adapters, making it a seamless upgrade for your existing tools.
POWERFUL 3 INCH KNOTTED WIRE - Engineered for aggressive rust and paint removal, delivering unmatched material stripping efficiency.
PRECISION QUALITY INSPECTION - 100% wire inspection guarantees reliability and longevity on every job.
PREMIUM CARBON STEEL CONSTRUCTION - Durable knotted wires withstand heavy-duty grinding without compromising performance.
BUILT IN SAFETY WITH INTERNAL PLATE - Ensures consistent wire retention and smooth, balanced operation for worry-free use.

The Dewalt DW4910 3-Inch Knotted Wire Cup Brush is a robust, carbon steel tool designed for heavy material removal tasks like rust and paint stripping. Featuring a safety-focused internal holding plate and 100% wire inspection, it ensures balanced, reliable performance. Compatible with standard 5/8-11 adapters, this brush is a must-have for professionals demanding durability and efficiency.

Specifications

Colour	Metal
Grit type	Coarse
Unit count	1 Count
Number of pieces	1
Recommended uses for product	Grinding, Paint Removal, Rust Removal
Manufacturer	Dewalt
UPC	028874049109
Global Trade Identification Number	00028874049109
Part number	Dewalt - DW4910
Item Weight	227 g
Product Dimensions	12.07 x 9.53 x 7.75 cm; 226.8 g
Item model number	DW4910
Size	1 Pack
Color	Metal
Style	Safety
Finish	Brushed
Power source type	Corded Electric
Item Package Quantity	1
Measurement System	English
Included components	3IN KNOTTED CUP BRUSH
Batteries Included?	No
Batteries Required?	No

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