The CMT 551-025X Bi-Metal Plus Hole Saw delivers precise 1" (25mm) diameter hole cutting in a wide range of demanding materials - from stainless steel and cast iron to aluminum, copper, brass, and plastics. Built with an 8% cobalt bi-metal construction, this hole saw is engineered for trades professionals who need extended tool life and consistent performance when drilling through tough metals. The right-hand rotation design and hexagonal shank provide a secure, reliable fit in cordless drills, corded drills, and drill presses alike, making it a versatile addition to any metal fabrication or plumbing toolkit.

Key Features

• Bi-Metal 8% Cobalt (BIM8%CO) Construction - the elevated cobalt content in the bi-metal teeth delivers significantly longer cutting life compared to standard hole saws, reducing downtime and replacement frequency on job sites where stainless steel and hardened metals are common.
• 1" (25mm) Cutting Diameter - a precise, standardized diameter suited for conduit knock-outs, pipe penetrations, and fastener clearance holes across steel, aluminum, and plastic assemblies.
• 45mm Cutting Depth - generous depth capacity allows the saw to cut through thick-walled materials and stacked workpieces without requiring multiple passes, improving efficiency on production and fabrication tasks.
• Hexagonal Shank Design - the hex shank provides a positive, slip-resistant connection to compatible arbors, reducing vibration and improving cut accuracy even under heavy load.
• Right-Hand Rotation - standard RH rotation ensures compatibility with the vast majority of drill chucks and arbors, making the saw easy to integrate into existing tool setups.
• Broad Material Compatibility - rated for stainless steel, steel, cast iron, aluminum, copper, brass, and plastics, this single hole saw handles the material range found across HVAC, electrical, plumbing, and general metalworking applications.

Why This Product

• Built for tough metals - the 8% cobalt bi-metal (BIM8%CO) formula is specifically formulated to handle stainless steel and cast iron, materials that rapidly wear down standard hole saws, giving professionals a longer-lasting cutting solution.
• One hole saw, many materials - compatibility with stainless steel, cast iron, aluminum, copper, brass, and plastics means fewer tool changes and a more streamlined kit for multi-trade or multi-material projects.
• Secure tool engagement - the hexagonal shank design reduces the risk of cam-out or slipping under torque, which is critical when cutting through dense materials like cast iron or thick steel plate.
• Ample depth for real-world applications - the 45mm cutting depth accommodates thick structural members, multi-layer assemblies, and deep-wall conditions that shallower hole saws cannot handle in a single pass.

Specifications

• Manufacturer Part Number: 551-025X
• Brand: CMT Orange Tools
• Diameter: 1" (25mm)
• Cutting Depth: 45mm
• Material: Bi-Metal (BIM) 8% Cobalt
• Shank: Hexagonal
• Rotation: Right-Hand (RH)

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, corded drills, and drill presses