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Diablo Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit with Tri-Metal Fusion Welding – 3/4″ Diameter, 21″ Length, 16″ Working Length – DMAMX1140 3/4″ x 16″ x 21″
If your jobs regularly involve reinforced concrete, the Diablo Rebar Demon™ SDS-Max 4-Cutter bit (DMAMX1140) is designed to stay productive when standard bits bog down or wear prematurely. With a 3/4″ cutting diameter, 21″ overall length, and 16″ working length, it’s a strong pick for deeper anchor holes and general drilling where you need consistent results.
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This bit pairs a full carbide head with Diablo’s Dura-Carbide technology and a precision tip aimed at stable starts and accurate hole placement. When you encounter rebar, the design is built to reduce vibration and promote controlled, consistent wear—helping you keep moving without constantly swapping bits.
Durability is further reinforced by Tri-Metal Fusion Welding, engineered to maintain the integrity of the carbide head under severe impacts. An optimized, straight-flute design supports faster dust removal to help keep the head cooler and maintain drilling efficiency over time.
Enhanced Durability – Diablo’s Dura-Carbide technology offers up to 2X more carbide, enduring up to 1800°F. This significantly enhances durability by resisting intense heat and rebar impact that typically cause standard bits to fail at 800°F.
Superior Impact Resistance – The Carbide Head ensures controlled, consistent carbide wear and reduced vibration. This design allows for smaller, more manageable rebar extractions, delivering fast and precise holes even under extreme conditions.
Advanced Weld Strength – Equipped with Tri-Metal Fusion Welding, the bits feature a weld that is up to 3X stronger. This weld maintains the integrity of the full carbide head during severe impacts, such as hitting rebar, and prevents premature breakage.
Optimized Flute Design – The flute design enhances dust removal, which keeps the carbide head cooler and prolongs its strength and durability. This results in faster and efficient drilling, preserving the bit’s sharpness and structural integrity.
Precision and Consistency – The precision tip of the bits ensures stable and accurate drilling, crucial for creating precise holes quickly in reinforced concrete for anchor setting.
Specs at a glance: SDS-Max shank; 3/4″ minimum bore diameter; 4 flutes; brushed finish; recommended surface: concrete. Includes one 3/4 in. x 16 in. x 21 in. Rebar Demon™ SDS-Max 4-Cutter Full Carbide Head bit. Warranty: 12 months.
