L H Dottie Co MD2 Carbide Tip Masonry Drill Bit

Product Description

The L H Dottie Co MD2 is a carbide-tipped masonry drill bit designed for boring through concrete, brick, block, and similar masonry materials. The carbide tip provides the hardness needed to penetrate dense aggregate surfaces without rapid wear. Sold individually, this bit measures 1/4 inch in diameter with a 4 inch overall length, making it a practical size for anchor hole drilling, conduit penetrations, and similar trade applications. It is a standard-use bit suitable for rotary hammer drills and hammer drills commonly found in electrical, plumbing, and HVAC rough-in work.

This masonry drill bit is well-suited for residential and light commercial installations where concrete or masonry penetration is required. Typical use cases include drilling anchor points for equipment mounting, running conduit through block walls, and setting fasteners in poured concrete. The 1/4 inch diameter is a common size for sleeve anchors and conduit straps, making the MD2 a go-to bit for trade professionals working in masonry environments.

Key Features

• Carbide tip construction for durability in hard masonry materials including concrete, brick, and block
• 1/4 inch diameter suits standard anchor and fastener hole requirements
• 4 inch overall length provides reach for typical wall and slab penetrations
• Sold as a single unit (each)

Compatibility

Designed for use with standard rotary hammer drills and hammer drills accepting a 1/4 inch round shank bit. Suitable for drilling concrete, brick, block, and similar masonry substrates.

Installation Notes

A licensed electrician, plumber, or HVAC technician typically installs masonry anchors and penetrations as part of equipment rough-in. Always wear eye protection and appropriate PPE when drilling masonry. Confirm that no embedded conduit, rebar, or utility lines are present in the drilling path before proceeding. Use the hammer or rotary-hammer mode on the drill for best performance and bit longevity.