The M20 Hole Cleaning Brush is a rotary cleaning tool designed specifically to prepare 20 mm drilled holes prior to installing chemical anchors, resin capsules or mechanical fixings. Its primary use is to remove dust, drilling slurry and loose particles from concrete, brick and masonry holes so that adhesive anchors achieve their specified bond strength.

This brush features tightly twisted knotted filaments manufactured from stainless steel EN 10088-2 grade 1.4301 (AISI 304), offering good corrosion resistance during repeated use. The filaments are fixed to a zinc‑plated steel core to resist corrosion of the mount, and the nominal brush diameter is sized to suit a 20 mm hole. The brush is supplied with a 6 mm hex shank so it can be used in standard drill chucks and quick‑change 1/4" hex adaptors; it is intended for use at moderate speeds (typically up to 800 rpm) — check anchor manufacturer guidance for specific cleaning procedures. The brush construction follows recognised manufacturing quality systems (ISO 9001) and meets common industry expectations for wire cleaning tools and accessory fitment.

Typical applications include cleaning drilled holes for chemical anchors, bonded rebar dowels, fixings for façade brackets, railings and machinery bases in construction, civil engineering and M&E installations. The brush is widely used by contractors, anchor installers, scaffolders and maintenance teams where consistent hole cleanliness is essential for reliable bonding of epoxy, polyester and vinylester adhesives.

Key benefits of the M20 Hole Cleaning Brush are its corrosion-resistant stainless filaments that resist breakage and contamination, the correct sizing for effective contact with the hole wall, and compatibility with standard drill drive systems. Proper brushing ahead of blowing or vacuuming significantly improves adhesive penetration and anchor performance compared with uncleaned holes.

Duchy Fasteners stocks the M20 Hole Cleaning Brush as part of a full range of hole brushes covering common diameters. We offer single items and trade packs to suit installers and supply houses — contact us for available pack quantities and lead times.