DeWALT High Impact Carbide SDS-Plus 4-Cutter Masonry Drill Bit - 3/16 in. x 4 in. x 6-1/2 in. is engineered for demanding concrete, block, and masonry drilling applications where speed and longevity are critical. This 25-pack of DeWALT SDS-Plus bits features a high-impact carbide tip combined with a four-flute design, delivering fast material removal and extended bit life compared to standard masonry bits. Whether you are drilling anchors into concrete, setting fasteners in block walls, or running repeated holes through hard masonry, this bit is built to keep up with professional-grade workloads.

Key Features

• 2X More Carbide for Longer Life - double the carbide material means the cutting tip resists wear and holds its edge longer, reducing the frequency of bit replacement on the job site.
• Four-Flute Design for Fast, Efficient Drilling - the elongated four-flute configuration continuously clears dust and debris from the hole during drilling, preventing clogging and maintaining aggressive cutting speed throughout the full depth of cut.
• High-Impact Carbide Tip - engineered to handle the hammer action of SDS-Plus rotary hammers without chipping or fracturing, delivering consistent performance in hard concrete and masonry.
• Innovative Bonding System for Durability - the carbide tip is secured with an advanced bonding process that keeps it firmly in place under the stress of repeated hammer blows, reducing tip loss and extending overall bit life.
• SDS-Plus Shank - the SDS-Plus interface provides a secure, tool-free bit change and allows the hammer mechanism to drive the bit independently from the chuck rotation, maximizing drilling efficiency and compatibility with standard SDS-Plus rotary hammers.
• 3/16 in. Diameter x 4 in. Usable Length - sized for precision anchor and fastener holes in concrete and masonry, with a 4 in. usable length that accommodates common embedment depths in structural and finish applications.
• 25-Pack Quantity - supplied in a pack of 25 bits, reducing downtime on large-volume projects by keeping replacement bits on hand throughout the job.

Why This Product

• Professionals drilling high volumes of anchor holes in concrete or masonry benefit from the 25-pack format - having 25 bits available means less interruption and fewer trips to resupply during heavy production work.
• The 2X more carbide construction directly addresses one of the most common frustrations with masonry bits - premature tip wear - making these a practical choice for contractors who need consistent hole quality over hundreds of holes.
• The four-flute open-head design solves the problem of debris buildup that slows standard two-flute bits, keeping drilling fast and reducing the need to withdraw the bit to clear the hole.
• The SDS-Plus 4-cutter configuration is purpose-built for use with SDS-Plus rotary hammers, ensuring full compatibility with one of the most widely used tool platforms in concrete drilling and anchor installation.

Specifications

• Manufacturer Part Number: DW5503B25
• Shank Type: SDS-Plus 4-Cutter
• Diameter: 3/16 in.
• Usable Length: 4 in.
• Overall Length: 6-1/2 in.
• Pack Size: 25

Frequently Asked Questions

What type of rotary hammer is this bit compatible with?

This bit uses an SDS-Plus shank, which is compatible with SDS-Plus rotary hammers. The SDS-Plus interface allows tool-free bit changes and enables the hammer mechanism to operate independently from the chuck rotation for efficient concrete and masonry drilling.

What is the usable drilling depth of this bit?

The usable length of this bit is 4 in., which is the effective cutting depth available for drilling. The overall length of the bit is 6-1/2 in., with the remaining length accounting for the shank and shoulder above the working flutes.

Why does the four-flute design matter compared to a standard two-flute masonry bit?

The four-flute design continuously removes dust and debris from the hole while drilling. This open-head configuration keeps the cutting path clear, which maintains faster drilling speeds and reduces the need to withdraw the bit during operation - a meaningful advantage when drilling numerous holes in concrete or block.

How many bits are included in this pack, and what diameter are they?

This pack contains 25 bits, each measuring 3/16 in. in diameter. The 25-pack format is well-suited for production drilling work where bit turnover is expected and having spares on hand keeps the job moving without interruption.