Metallics BFR22 Masonry Drill Bit Carbide Slow Spiral Dia 3/16" 6 Shank 9/64" (1pc)

The BFR22 is a 3/16 inch diameter carbide-tipped masonry bit, so it drills a 3/16 inch hole in concrete, block, or brick. That is the hole size commonly called for by 3/16 inch tapcon-style concrete screws and by many plastic anchors sized for #8 to #10 fasteners. The shank measures 9/64 inch.

It is a round-shank bit at 9/64 inch, not an SDS shank, so it goes into a standard keyed or keyless three-jaw chuck on a corded drill or hammer drill. If your tool is an SDS-Plus or SDS-Max rotary hammer, this bit will not seat in it without a chuck adapter.

Slow spiral is what you want in masonry. The BFR22 uses a slow (low helix) flute, which keeps a stiffer body and clears the fine powder that concrete, block, and brick produce under hammer action. Fast spiral geometry is built to pull long chips out of wood and metal, and in masonry it tends to load up and flex. For an electrical rough-in drilling anchor holes in a concrete wall or deck, slow spiral carbide is the standard.

One bit per pack, supplied in a pouch. If you are drilling a long run of strut, clip, or box anchor holes in concrete, order multiples, since a 3/16 inch carbide bit wears and loses diameter over repeated holes and an undersized hole will stop a concrete screw from seating.

Order Metallics BFR22. That is the manufacturer part number for the 3/16 inch diameter carbide slow spiral masonry bit with the 9/64 inch shank, and it is the only model on the item.