Disston Company 120790 Masonry Drill Bit 1/4 X 6 Inch

Product Description

The DISSTON COMPANY 120790 is an extra-length masonry drill bit designed for use in rotary drills to bore through a wide range of masonry and concrete materials. The bit measures 1/4 inch in diameter and 6 inches in length, with a 1/4-inch shank for standard chuck compatibility. A positive point angle geometry promotes quick, accurate penetration on contact, reducing walking on hard surfaces. The zinc surface finish provides a degree of corrosion resistance for storage in field tool kits. This bit is suited for trade professionals and experienced DIYers working on masonry applications in construction, renovation, and maintenance settings.

The 120790 is recommended for drilling cinder block, common brick, plaster, and ceramic tile. It is also rated for moderate use in hard brick, glazed tile, and dry concrete. The extra-length design allows deeper penetration in single-pass drilling without needing an extension, which is useful in anchor installation, conduit routing through block walls, and similar trade applications in both residential and light commercial construction.

Key Features

• 1/4-inch diameter by 6-inch extra-length design for deeper single-pass boring
• Positive point angle for quick, accurate penetration and reduced bit walking
• Zinc surface finish for corrosion resistance
• 1/4-inch shank fits standard rotary drill chucks
• Rated for cinder block, common brick, plaster, and ceramic tile; moderate use in hard brick, glazed tile, and dry concrete

Compatibility

Designed as an OEM-style replacement or standard-use masonry bit for rotary drills accepting a 1/4-inch straight shank, suitable for drilling cinder block, common brick, plaster, ceramic tile, hard brick, glazed tile, and dry concrete.

Installation Notes

Masonry drill bits should be installed by qualified tradespeople familiar with rotary drilling in masonry substrates. Power down and disconnect the drill before changing bits. Use appropriate RPM settings for masonry — lower speeds are generally recommended to reduce heat buildup and extend bit life. Always wear appropriate eye protection and dust control measures when drilling masonry materials.