L H Dottie Co MD7L Masonry Drill Bit 5/8x6 in

Product Description

The L H Dottie Co MD7L is a masonry drill bit sized at 5/8 inch diameter by 6 inches in length. It is designed for boring through concrete, block, brick, and similar masonry materials. Electricians, plumbers, HVAC technicians, and general contractors use masonry bits like this when routing conduit, pipe sleeves, or equipment anchors through structural masonry walls and floors. The MD7L is sold individually and is suited for use with standard rotary hammer or hammer drill equipment.

This bit is a practical addition to any trade toolkit where penetrations through masonry substrates are part of routine work. Common applications include sleeve installations for refrigerant line sets, conduit rough-in through concrete block walls, anchor bolt holes in poured concrete, and through-wall penetrations for plumbing stub-outs. The 5/8 inch diameter fits common sleeve and anchor sizing used across HVAC, plumbing, and electrical trades.

Key Features

• 5/8 inch cutting diameter for common sleeve and anchor applications
• 6 inch overall length provides reach through standard masonry wall thicknesses
• Designed for use with rotary hammer or hammer drill equipment
• Sold individually — one bit per unit

Compatibility

Designed as a standard masonry drill bit for use with rotary hammer and hammer drill chucks accepting 5/8 inch shank tooling. Suitable for concrete, brick, block, and similar masonry substrates.

Installation Notes

A licensed or qualified tradesperson should select the appropriate drill mode — rotary hammer mode for hard concrete, hammer drill mode for softer block — before use. Always wear appropriate eye and respiratory protection when drilling masonry. Confirm no embedded conduit, rebar, or utilities are present in the drilling path before starting. Follow applicable local codes for sleeve sizing and fire-stopping requirements when penetrating rated assemblies.