Disston Company 120535 Masonry Drill Bit 1/8 X 3 Inch

Product Description

The DISSTON COMPANY 120535 is a 1/8-inch by 3-inch masonry drill bit with a straight shank, designed for boring into hard mineral substrates. The carbide-tipped cutting edge handles common masonry materials including cinder block, common brick, plaster, and ceramic tile. This bit is suited for occasional use in hard brick, glazed tile, and dry concrete as well. It is a standard carded, single-piece accessory used by electricians, plumbers, HVAC techs, and general tradespeople when routing penetrations through masonry walls, floors, or slabs. The compact 1/8-inch diameter makes it well suited for anchor pilot holes and conduit entry points.

This bit fits standard rotary drills and hammer drills with a straight-shank chuck. Recommended applications include drilling cinder block, common brick, plaster, ceramic tile, and wet concrete. It is also rated for occasional use in hard brick, glazed tile, and dry concrete. The small diameter and 3-inch working length make it a practical choice for light-duty masonry penetrations in residential and light commercial settings. Trades commonly reach for this size when setting sleeve anchors, running low-voltage wiring through masonry partitions, or installing junction boxes in block walls.

Key Features

• 1/8-inch diameter by 3-inch length for small-diameter masonry penetrations
• Straight shank fits standard drill chucks without adapters
• Rated for cinder block, common brick, plaster, and ceramic tile
• Suitable for occasional use in hard brick, glazed tile, and dry concrete
• Carded single-unit packaging for easy jobsite inventory

Compatibility

Designed for use with standard rotary drills and hammer drills equipped with a straight-shank chuck. Suitable for light-duty masonry drilling tasks across residential and light commercial applications.

Installation Notes

A licensed electrician, plumber, or HVAC technician typically uses masonry bits when penetrating block or brick walls for conduit, pipe, or cable runs. Always confirm the drill is set to the correct mode — rotary hammer mode for harder substrates, standard rotary for softer masonry such as plaster. Keep steady, moderate pressure on the drill to avoid overheating the tip; withdraw the bit periodically to clear dust. Follow applicable codes such as the NEC or IPC when sizing and locating wall penetrations for electrical or plumbing runs.