The CMT 551-035X Bi-Metal Plus Hole Saw delivers professional-grade hole cutting in a compact 1-3/8 in. (35mm) diameter format. Built with 8% Cobalt bi-metal construction, this CMT hole saw is engineered for demanding applications in steel, stainless steel, cast iron, aluminum, copper, brass, and plastics - providing twice the cutting life of standard hole saws so tradespeople and contractors can tackle more holes per blade. The Push and Lock quick-change system means you spend less time swapping tools and more time cutting, making it a reliable choice for cordless drills, corded drills, and drill presses alike.

Key Features

• 8% Cobalt Bi-Metal (BIM) Construction - delivers 2x longer cutting life compared to standard hole saws, reducing replacement frequency and lowering cost per hole on steel and stainless steel cutting jobs.
• 1-3/8 in. (35mm) Cutting Diameter - sized for precise hole cutting in a wide range of materials, from sheet metal and structural steel to plastics and non-ferrous metals, with consistent results across applications.
• 45mm Cutting Depth - accommodates thick workpieces and layered materials, giving you the reach needed to cut through heavy-gauge stock or stacked sections without repositioning.
• XTREME FAST Push and Lock System - changes hole saws in under 3 seconds with no tools required, keeping your workflow moving efficiently on multi-diameter jobs.
• Variable 4-6 TPI Alternate and Side-Set Teeth - the variable pitch reduces vibration and chatter, resulting in smoother cuts and extended tooth life across a broad range of material thicknesses.
• Right-Hand Rotation (RH) - compatible with standard drill chucks and drill press spindles, making this hole saw straightforward to use with common jobsite equipment.
• Hexagonal Shank - locks securely in the arbor to minimize slippage under load, maintaining accuracy and safety during high-torque cutting in tough materials.
• Compatible with 550-PH85 and 550-PH11 Push and Lock Arbors - works with both 11/32 in. hex and 7/16 in. hex arbor options, giving you flexibility across different drill configurations.
• Made in Italy - manufactured to tight tolerances for dimensional accuracy and consistent cutting performance across the full range of compatible materials.

Why This Product

• If you regularly cut holes in stainless steel or hardened steel - materials that quickly dull standard bi-metal saws - the 8% Cobalt construction means the blade stays sharp significantly longer, reducing downtime for blade changes and lowering overall tooling cost.
• The 45mm cutting depth makes this 35mm hole saw practical for thicker substrates and multi-layer assemblies where a shallower saw would require a second pass or fail to complete the cut cleanly.
• The XTREME FAST Push and Lock system is designed specifically for jobs that require multiple hole sizes - switching between saw diameters takes under 3 seconds without any tools, which adds up to real time savings on larger installations.
• With compatibility across stainless steel, cast iron, aluminum, copper, brass, and plastics, this single hole saw covers the material range commonly encountered in mechanical, electrical, and plumbing rough-in work - reducing the number of specialty blades you need to carry.

Specifications

• Manufacturer Part Number: 551-035X
• Brand: CMT Orange Tools
• Diameter: 1-3/8 in. (35mm)
• Cutting Depth: 45mm
• Blade Material: Bi-Metal (BIM) 8% Cobalt
• Tooth Pitch: Variable 4-6 TPI (alternate and side-set)
• Rotation: Right-Hand (RH)
• Shank: Hexagonal
• System: XTREME FAST Push and Lock
• Arbor Compatibility: 550-PH85 (11/32 in. hex) and 550-PH11 (7/16 in. hex) Push and Lock arbors
• Country of Origin: Made in Italy

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