The Simpson 1/2 in. Wire Hole-Cleaning Brush Head is purpose-built for cleaning drilled holes prior to adhesive anchor installation, ensuring the bore is properly prepped before applying Simpson SET-3G or AT-3G adhesive. Engineered with a combination-material brush head sized precisely for 1/2 in. hole diameters, this brush delivers thorough hole cleaning with fewer brush strokes at embedments up to 20 times the anchor diameter - helping contractors achieve reliable, high-strength anchor performance on every installation.

Key Features

• 1/2 in. brush head for 1/2 in. hole diameters - matched exactly to the hole size for effective wall-to-wall contact and consistent debris removal with every stroke
• Compatible with #3 rebar size - sized to coordinate with the corresponding anchor rod dimension, keeping your installation system properly matched from hole prep through adhesive cure
• Designed for use with Simpson SET-3G and AT-3G adhesives - optimized for the cleaning protocol required by these adhesive systems, helping meet application requirements and supporting code-compliant anchor installations
• 5 in. useable brush length - provides substantial cleaning reach; total usable assembly length is calculated by adding the brush length, T-handle length, and any optional extension used, giving installers flexibility for varying embedment depths
• T-handle sold separately (model ETBS-TH required) - the modular design lets you build out a cleaning assembly with handles and extensions sized for your specific job conditions, rather than paying for components you may not need

Why This Product

• Fewer brush strokes, faster hole prep - the brush is engineered to permit proper hole cleaning with fewer brush strokes at embedments up to 20 times the anchor diameter, reducing labor time during high-volume anchor installations
• System-matched compatibility - built specifically for use with Simpson SET-3G and AT-3G adhesives, so the cleaning process aligns directly with the adhesive manufacturer's requirements rather than relying on a generic alternative
• Modular assembly for job-site flexibility - the brush head works with separately available T-handles and extensions, allowing installers to configure the right total usable length for varying hole depths without being locked into a single fixed tool
• Precise sizing for accurate anchor prep - a brush head diameter matched to the 1/2 in. hole ensures the wire bristles reach the full bore wall, which is critical for removing dust and debris that could otherwise compromise adhesive bond strength

Specifications

• MPN: ETB50S
• Brush Head Diameter: 1/2 in.
• Hole Diameter: 1/2 in.
• Rebar Size: #3
• Useable Brush Length: 5 in.
• Material: Combination
• Packaging: Packs of 1 and Cartons of 25

Approved Applications

• Cleaning drilled holes prior to adhesive anchor installation
• For use with Simpson Strong-Tie SET-3G high-strength epoxy adhesive
• For use with Simpson Strong-Tie AT-3G high-strength hybrid acrylic adhesive
• Suitable for embedments up to 20 times the anchor diameter

Frequently Asked Questions

What adhesive systems is the ETB50S wire brush head compatible with?

The ETB50S is designed for use with Simpson Strong-Tie SET-3G and AT-3G adhesives to permit proper hole cleaning with fewer brush strokes at embedments up to 20 times the anchor diameter.

Does this brush head include a T-handle?

No. A T-handle (model ETBS-TH) is required for use with all sizes of standard wire brush, but it is sold separately. Extensions and brushes are also sold separately.

What is the useable brush length of the ETB50S?

The ETB50S has a 5-in. useable brush length. To obtain the total usable length of your assembly, add the usable length of the brush, the handle, and any optional extension used.

What hole diameter and rebar size is this brush head intended for?

The ETB50S is sized for a 1/2-in. hole diameter and is compatible with #3 rebar size anchor installations.

Related Products

• SET-3G
• AT-3G

Note: Product dimensions and/or length may differ from picture. Please see the item description above for specifications.