The Diablo 4-1/8" Carbide Teeth Hole Saw for Wood and Metal is a professional-grade cutting tool engineered to handle virtually every material a tradesperson encounters on the job. Unlike conventional bi-metal hole saws that are limited to a single material type, this Diablo carbide hole saw delivers up to 50X longer cutting life while powering through hardwoods, softwoods, nail-embedded wood, plastic, aluminum, cast iron, stainless steel, fiber cement, fiberglass, composite decking, siding, roofing, and more - all with a single saw. Designed for use with a drill press or handheld drill, it is the go-to choice for electricians, plumbers, HVAC installers, and general contractors who need reliable, fast hole cutting across mixed-material job sites.

Key Features

• 50X longer cutting life than bi-metal - dramatically reduces how often you replace hole saws, lowering tool costs and downtime on the job.
• 65mm (2-3/8") cutting depth provides 40% deeper holes in a single pass - means fewer repositioning steps, faster throughput, and cleaner results through thick material stacks.
• Carbide teeth construction - maintains sharpness and cutting efficiency through hardwoods, nail-embedded wood, stainless steel, cast iron, plastic, and aluminum where bi-metal teeth would dull quickly.
• Snap-Lock Plus mandrel system compatibility - allows quick, tool-free saw changes with no downtime between cuts, keeping your workflow moving without searching for wrenches.
• Mandrel fits all Diablo hole saws from 5/8" to 6" diameter - one mandrel system handles your entire Diablo hole saw kit, reducing accessory clutter and investment.
• Tool-free plug ejection - removes cut slugs instantly without stopping to pry out material, speeding up repetitive hole cutting tasks significantly.
• 4-1/8" diameter cutting capacity - sized for large-bore applications such as recessed lighting, drain fittings, and HVAC penetrations through walls, roofing, and decking.

Why This Product

• Contractors working across mixed-material environments - wood framing, metal studs, stainless fixtures, and fiber cement - no longer need multiple hole saws. A single carbide teeth saw handles all of these materials, consolidating your tool bag and cutting purchasing costs.
• For jobs involving nail-embedded wood, standard bi-metal saws dull rapidly or fail entirely. The carbide teeth on this Diablo saw are specifically rated for nail-embedded wood, meaning you can cut through reclaimed lumber or existing framing without swapping tools or suffering through a ruined saw.
• The 2-3/8" cutting depth lets you punch through thick assemblies - double-layer decking, insulated panels, or stacked materials - in a single plunge, eliminating the need for multiple passes and significantly speeding up production.
• The tool-free plug ejection and Snap-Lock Plus compatibility together create a fast, ergonomic workflow: no stopping to knock out slugs, no fumbling with wrenches to change saws, and no adapters needed across your Diablo hole saw collection from 5/8" to 6".

Specifications

• Brand: Diablo
• Model Number: DHS4125CT
• Diameter: 4-1/8"
• Length: 2-3/8"
• Shank: Diablo Mandrel
• Compatible Tools: Drill Press; Hand Held Drill
• Compatible Materials: Hardwoods; Softwoods; Steel; Plastic; Siding; Clean Wood; Composite Decking; Fiber Cement; Fiberglass; Laminate; Nail-Embedded Wood; Stainless Steel; Steel Studs; Roofing
• Usage: Drilling clean wood, nail-embedded wood, plastic, aluminum, metal, cast iron and stainless steel
• Pack Quantity: 1
• Country of Origin: Switzerland

Approved Applications

• Hole cutting in woods, plastics, and metals - including hardwoods, softwoods, nail-embedded lumber, stainless steel, cast iron, aluminum, plastic, fiber cement, fiberglass, composite decking, siding, laminate, roofing, and steel studs

Frequently Asked Questions

What materials can this Diablo carbide hole saw cut?

This hole saw is rated for a wide range of materials including hardwoods, softwoods, nail-embedded wood, clean wood, plastic, laminate, siding, composite decking, fiber cement, fiberglass, aluminum, steel, stainless steel, steel studs, cast iron, and roofing materials - making it one of the most versatile hole saw options available for mixed-material work.

Does this hole saw require a special mandrel, and what sizes does that mandrel support?

This saw uses the Diablo Snap-Lock Plus mandrel system. That mandrel is compatible with all Diablo hole saws ranging from 5/8" to 6" in diameter, so one mandrel covers your entire Diablo collection. Saw changes are tool-free, requiring no wrenches or adapters.

How does the cutting life of this carbide hole saw compare to bi-metal hole saws?

Diablo rates this carbide teeth hole saw at up to 50X longer cutting life than bi-metal hole saws. The carbide teeth maintain their edge through demanding materials like stainless steel, cast iron, and nail-embedded wood that would quickly dull standard bi-metal teeth.

What is the cutting depth of this 4-1/8" hole saw, and why does that matter?

The cutting depth is 65mm (2-3/8"), which Diablo notes delivers 40% deeper holes in a single pass. This means you can cut through thicker assemblies - such as doubled-up decking, insulated walls, or layered roofing materials - without repositioning or making multiple passes, which saves significant time on production work.