The CMT 551-064X Bi-Metal Plus Hole Saw delivers a 2-1/2 in. (64mm) cutting diameter with 8% Cobalt bi-metal construction, engineered for professionals who need consistent, long-lasting performance when cutting through steel, stainless steel, cast iron, aluminum, copper, brass, and plastics. Built by CMT with a right-hand rotation and a hexagonal shank interface, this hole saw is designed to handle demanding metal-cutting applications where ordinary hole saws wear out prematurely. Whether you are working on HVAC installations, electrical conduit runs, plumbing rough-ins, or fabrication projects, the 551-064X provides the cutting depth and material versatility to get the job done efficiently.

Key Features

• Bi-Metal 8% Cobalt (BIM) Construction - the elevated cobalt content in the tooth material significantly extends cutting life compared to standard bi-metal hole saws, reducing replacement frequency and downtime on the job site.
• 2-1/2 in. (64mm) Cutting Diameter - produces clean, accurate holes sized for common trade applications including conduit fittings, pipe pass-throughs, and panel knockouts, eliminating the need for secondary finishing in most materials.
• 45mm Cutting Depth - provides enough depth capacity to cut through structural steel panels, stacked sheet metal, thick-wall pipe, and multi-layer materials without repositioning or switching tools.
• Right-Hand Rotation (RH) - compatible with standard corded drills, cordless drills, and drill presses, so no specialized equipment is required to put this saw to work immediately.
• Hexagonal Shank Interface - the hex shank design resists slipping in the chuck or arbor, transferring torque more efficiently and keeping the saw centered during high-load cutting operations.
• Wide Material Compatibility - rated for cutting stainless steel, steel, cast iron, aluminum, copper, brass, and plastics, making this a single-tool solution across multiple trade disciplines rather than a single-application specialty saw.

Why This Product

• Professionals who regularly cut stainless steel or hardened steel benefit directly from the 8% Cobalt bi-metal formula, which maintains tooth hardness and edge integrity at elevated cutting temperatures where standard hole saws fail.
• The 64mm diameter is a practical size that covers a broad range of real-world trade openings - from standard electrical knockouts to common pipe and conduit fittings - reducing the number of individual saws a contractor needs to carry.
• The 45mm cutting depth accommodates thicker stock and multi-layer workpieces, so this hole saw handles structural and fabrication tasks that shallower saws cannot complete in a single pass.
• With compatibility across cordless drills, corded drills, and drill presses, this hole saw integrates into virtually any existing tool setup without requiring additional adapters beyond the appropriate hex arbor.

Specifications

• Manufacturer Part Number: 551-064X
• Brand: CMT Orange Tools
• Diameter: 2-1/2 in. (64mm)
• Cutting Depth: 45mm
• Material: Bi-Metal (BIM) 8% Cobalt
• Rotation: Right-Hand (RH)
• Shank: Hexagonal

Approved Applications

• Hole cutting in steel and stainless steel
• Hole cutting in cast iron
• Hole cutting in aluminum and non-ferrous metals
• Hole cutting in copper and brass
• Hole cutting in plastics
• Use with cordless drills
• Use with corded drills
• Use with drill presses