The CMT 550-210X Multi-Purpose TCT Hole Saw delivers an 8-1/4 in. (210mm) cutting diameter with carbide-tipped (TCT) teeth engineered for versatile hole cutting across a wide range of building materials. Designed for professional tradespeople and serious DIYers alike, this large-diameter hole saw handles everything from wood and sheet goods to plasterboard and soft masonry - making it a single go-to tool for multi-material jobsite applications. With a right-hand rotation and hexagonal shank interface, it integrates cleanly into standard drilling setups on corded drills, cordless drills, and drill presses.

Key Features

• 8-1/4 in. (210mm) Cutting Diameter - large-format hole capacity for electrical boxes, plumbing penetrations, HVAC openings, and other oversized rough-in applications where smaller hole saws fall short.
• Carbide-Tipped (TCT) Construction - HW Grade - hard metal carbide teeth maintain a sharp cutting edge far longer than bi-metal alternatives, reducing tooth wear and the need for frequent blade changes on demanding multi-material tasks.
• 8 Cutting Teeth - an 8-tooth configuration balances cutting speed with smooth chip evacuation, keeping the kerf clear and reducing heat buildup during deep cuts.
• 60mm Cutting Depth - penetrates through thick stacked materials, double-layer drywall, insulated panels, and structural members without needing to reposition or flip the workpiece.
• Hexagonal Shank - the hex shank interface locks securely into compatible arbors, eliminating slippage under the high torque loads generated by a large-diameter saw.
• Right-Hand (RH) Rotation - standard clockwise cutting direction pairs with conventional drill/driver operation, so no special tool settings or reverse-mode adjustments are needed.
• Multi-Purpose Material Compatibility - a single hole saw cuts wood, plywood, MDF, laminates, plasterboard, plastics, bricks, aerated concrete, and soft tiles, reducing the number of specialized blades a contractor needs to carry on site.

Why This Product

• Contractors who regularly punch through mixed-material assemblies - such as wood framing backed by plasterboard or plastic conduit through aerated concrete block - can rely on one carbide-tipped blade rather than swapping between material-specific hole saws mid-job.
• At 8-1/4 in. (210mm), this is a large-format hole saw suited for applications that demand oversized openings - recessed light housings, ductwork collars, and access panels - where smaller saws simply cannot reach the required diameter.
• The HW-grade hard metal carbide tip material extends service life compared to standard bi-metal teeth when cutting abrasive materials like laminates, aerated concrete, and soft masonry tile, delivering more cuts per blade before replacement is needed.
• The hexagonal shank provides a positive, slip-free connection to the arbor under heavy lateral and rotational loads - especially valuable when driving an 8 1/4 in. diameter cutter through dense or layered materials where torque demands are highest.

Specifications

• Manufacturer Part Number: 550-210X
• Brand: CMT Orange Tools
• Diameter: 8-1/4 in. (210mm)
• Cutting Depth: 60mm
• Number of Teeth: 8
• Blade Material: HW (Hard Metal Carbide-Tipped / TCT)
• Shank: Hexagonal
• Rotation: Right-Hand (RH)

Approved Applications

• Hole cutting in wood and plywood
• Hole cutting in MDF and laminates
• Hole cutting in plasterboard and drywall panels
• Hole cutting in plastics
• Hole cutting in bricks and aerated concrete
• Hole cutting in soft tiles