Walter 13-L 304 Knot-Twisted Wire Cup Brush with Support Ring, 3" Carbon Steel

Stop Flaring, Start Cleaning

Every welder knows the frustration of a cheap wire cup brush that flares out like a mushroom five minutes into the job. Once it flares, it stops digging and starts rubbing. The Walter Knot-Twisted Wire Cup Brush solves this problem with a simple but brilliant solution: a Safety Support Ring. This heavy-duty ring holds the knot-twisted wires tight, keeping them focused on the weld so you can rip through slag, spatter, and heavy rust without the brush losing its shape.

Built for serious fabrication work, this 3-inch brush fits your standard 4.5" or 5" grinder (5/8"-11 thread). The carbon steel wire is tough enough to strip mill scale and prep surfaces for painting or coating. When you finally wear the wires down to the ring, don't toss it—just knock the ring off. You'll reveal another inch of fresh wire ready to go to work. It's like getting two brushes in one.

Whether you are cleaning multipass welds, prepping a joint, or stripping corrosion off a repair piece, this Walter brush stays balanced and aggressive. Less vibration means your hands won't be buzzing at the end of the shift, and the controlled wire action means safer operation with fewer flying wires. Upgrade your grinder setup with a brush that actually lasts.