The CMT 551-068X Bi-Metal Plus Hole Saw delivers a 2-11/16" (68mm) cutting diameter built for demanding metalworking and multi-material drilling applications. Constructed from 8% Cobalt bi-metal (BIM) material, this hole saw provides twice the cutting life of standard hole saws, making it a reliable choice for contractors and fabricators cutting through stainless steel, structural steel, cast iron, aluminum, copper, brass, and plastics. The right-hand rotation design and hexagonal shank ensure secure, efficient power transfer in cordless drills, corded drills, and drill presses alike.

Key Features

• Bi-Metal 8% Cobalt (BIM) Construction - the high-cobalt alloy teeth deliver 2x longer cutting life compared to standard hole saws, reducing downtime and replacement frequency on heavy-use jobsites.
• 2-11/16" (68mm) Cutting Diameter - precisely sized for conduit knockouts, pipe penetrations, and fixture openings where accuracy is critical.
• 45mm Cutting Depth - accommodates thicker workpieces including structural sections, stacked materials, and deeper substrate cuts without losing performance.
• Hexagonal Shank - the hex shank interface locks securely into compatible arbors, preventing slippage under torque and ensuring consistent concentricity throughout the cut.
• Right-Hand Rotation - designed to work with standard drill rotation so there is no special machine setup required, making this saw immediately ready to use in any drill or drill press.
• XTREME FAST Push and Lock System - change hole saws in under 3 seconds with no tools required, reducing changeover time significantly on multi-size projects.
• Variable 4-6 TPI Alternate and Side-Set Teeth - the variable pitch geometry reduces harmonic vibration, produces a smoother cut edge, and handles both thin-wall and thick-wall materials in a single saw.

Why This Product

• Professionals who regularly cut stainless steel or hardened steel benefit directly from the 8% Cobalt BIM construction, which withstands the heat and abrasion those materials generate - extending tool life and lowering cost per hole.
• The 45mm cutting depth accommodates a wider range of real-world applications than shallower hole saws, including deep box penetrations and thick metal plate work, without requiring a specialty tool.
• The XTREME FAST Push and Lock arbor system is compatible with both 11/32" hex (550-PH85) and 7/16" hex (550-PH11) arbors, giving users flexible integration with existing setups rather than requiring new tooling purchases.
• The variable 4-6 TPI tooth pattern handles multiple material types - from cast iron to non-ferrous metals to plastics - making this a single versatile hole saw that reduces the number of specialty tools a crew needs on site.

Specifications

• Manufacturer Part Number: 551-068X
• Brand: CMT Orange Tools
• Diameter: 2-11/16" (68mm)
• Cutting Depth: 45mm
• Blade Material: Bi-Metal (BIM) 8% Cobalt
• Tooth Pitch: Variable 4-6 TPI (alternate and side-set)
• Shank: Hexagonal
• Rotation: Right-Hand (RH)
• System: XTREME FAST Push and Lock
• Arbor Compatibility: 550-PH85 (11/32" hex) and 550-PH11 (7/16" hex) Push and Lock arbors

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