CMT 550-111X Multi-Purpose TCT Hole Saw 4-3/8" is a tungsten carbide-tipped hole saw from CMT designed to cut clean, accurate holes across a wide range of materials - from wood, plywood, MDF, and laminates to plasterboard, plastics, bricks, aerated concrete, and soft tiles. Built for demanding jobsite and workshop use, this 111mm diameter hole cutter pairs a right-hand rotation with a hexagonal shank and 5 hardwearing carbide teeth, delivering reliable performance in cordless drills, corded drills, and drill presses alike.

Key Features

• 4-3/8" (111mm) diameter cutting capacity - sized for standard electrical, plumbing, and HVAC rough-in holes, reducing the need for secondary trimming or enlarging steps on the jobsite.
• Tungsten carbide-tipped (TCT) teeth - hardmetal (HW) construction - carbide retains a sharp cutting edge far longer than bi-metal alternatives, meaning fewer blade changes and more consistent hole quality across heavy use.
• 5 carbide teeth - an optimized tooth count balances fast material removal with smooth cut quality, making this saw effective on both dense and lightweight substrates without excessive vibration.
• 60mm cutting depth - accommodates standard wall thicknesses and structural lumber dimensions, letting you cut through typical framing and panel materials in a single pass.
• Right-hand (RH) rotation - compatible with all standard drills and drill presses without requiring reverse mode, keeping setup simple and straightforward.
• Hexagonal shank - the hex shank seats securely in drill chucks and arbor systems, reducing slipping and improving torque transfer for cleaner, more controlled cuts.
• Multi-purpose material compatibility - one hole saw handles wood products, plasterboard, plastics, bricks, aerated concrete, and soft tiles, reducing the number of specialized tools needed on the job.

Why This Product

• One tool across many substrates - the TCT construction and multi-purpose design mean this single 4-3/8" hole saw handles wood, sheet goods, masonry-type materials, plastics, and tile, cutting down on tool inventory and switching time when multiple material types appear on the same project.
• Carbide longevity in tough applications - hardmetal (HW) carbide teeth hold their edge through abrasive materials like bricks and aerated concrete that would quickly wear out standard hole saws, making this a cost-effective choice for contractors who cut these materials regularly.
• Practical 60mm depth in a 111mm diameter - this combination covers a broad range of real-world rough-in and penetration tasks, from panel work to wall framing, without requiring oversized or specialty equipment.
• Hex shank reliability - the hexagonal shank interface prevents the chuck slippage that round-shank hole saws can experience under load, particularly important at larger diameters like 111mm where torque demands are higher.

Specifications

• Manufacturer Part Number: 550-111X
• Brand: CMT Orange Tools
• Diameter: 4-3/8" (111mm)
• Cutting Depth: 60mm
• Number of Teeth: 5
• Blade Material: HW (Hardmetal / Tungsten Carbide-Tipped)
• Shank Type: Hexagonal
• Rotation: Right-Hand (RH)

Approved Applications

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