CMT 550-108X Multi-Purpose TCT Hole Saw 4-1/4" (108mm) is a tungsten carbide-tipped cutting tool engineered for versatile, high-performance hole cutting across a wide range of construction and renovation materials. Designed for right-hand rotation and featuring a hexagonal shank, this 108mm hole saw delivers clean, precise cuts through wood, sheet goods, plasterboard, plastics, masonry, and soft tiles - making it a reliable choice for contractors, tradespeople, and serious DIYers who need one tool that handles multiple substrate types.

Key Features

• 4-1/4" (108mm) cutting diameter - sized for common construction applications such as pipe penetrations, recessed fixture openings, and conduit passages, reducing the need for multiple saws on a single job.
• 60mm cutting depth - reaches through thick framing members, stacked laminates, and double-layer plasterboard in a single pass, minimizing repositioning and saving time on site.
• Tungsten carbide-tipped (TCT) teeth construction - hard metal carbide tips stay sharp significantly longer than standard bi-metal alternatives when cutting abrasive materials like aerated concrete, soft tiles, and dense laminates.
• 5-tooth configuration - balances cutting speed with chip clearance, producing smooth bore walls in wood, MDF, plywood, and plastics while reducing the chance of blade binding.
• Hexagonal shank design - provides a positive, slip-resistant grip in drill chucks, ensuring consistent torque transfer and reducing the risk of shank slippage under heavy load.
• Right-hand rotation - compatible with all standard corded and cordless drills as well as drill presses, making it easy to integrate into existing tool setups without adapters.
• Multi-material capability - one hole saw cuts wood, plywood, MDF, laminates, plasterboard, plastics, bricks, aerated concrete, and soft tiles, reducing the number of specialized blades needed on a job site.

Why This Product

• Contractors working across mixed-material substrates - wood framing, plasterboard ceilings, masonry walls, and plastic panels - can rely on a single 4-1/4" TCT hole saw rather than carrying multiple material-specific blades, streamlining the toolbox and reducing downtime.
• The 60mm cutting depth accommodates real-world construction thicknesses, including double-layer drywall and nominal lumber, so a complete hole is achieved without flipping or restacking material in many common scenarios.
• Carbide-tipped teeth maintain cutting performance in abrasive materials like aerated concrete and soft tiles that would rapidly degrade standard bi-metal hole saws, extending the usable life of the blade and lowering overall cost per cut.
• The hexagonal shank ensures the saw seats securely in drill chucks without requiring a set-screw arbor for basic use, making it straightforward to mount and begin cutting quickly.

Specifications

• Manufacturer Part Number: 550-108X
• Brand: CMT Orange Tools
• Diameter: 4-1/4" (108mm)
• Cutting Depth: 60mm
• Number of Teeth: 5
• Blade Material: HW (Tungsten 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
• Hole cutting in plastics
• Hole cutting in bricks and aerated concrete
• Hole cutting in soft tiles