Hole saw M.K. Morse Advanced Bi‑Metal 95 mm (3‑3/4") – bi‑metal construction for wood and metal

The M.K. Morse Advanced Bi‑Metal 95 mm (3‑3/4") hole saw is a bi‑metal cutting tool engineered for drilling precise, clean holes in wood and metal. Its combination of high‑speed steel teeth and a flexible backing offers a balance of cutting performance and resistance to heat and wear, making it suitable for both hand drills and drill presses. The tool is intended for creating openings for pipes, conduits, recessed fittings and other installation tasks in construction and renovation projects.

Advantages

The bi‑metal construction provides long cutting life and improved toughness compared with single‑material hole saws, reducing the risk of tooth breakage when cutting through mixed or abrasive materials. The saw's tooth geometry is designed to remove material efficiently, resulting in cleaner hole edges and less finishing work. Compatibility with standard mandrels and arbors for hand and bench drilling offers practical versatility on job sites and in workshops.

Suitable for

• Cutting holes in softwood, hardwood and plywood for plumbing and electrical installations
• Drilling openings in thin to medium‑gauge sheet metal and HVAC components
• Creating recessed fittings and access holes in renovation and retrofit work
• Use with handheld power drills and drill presses for controlled drilling

Key specifications

• Cutting diameter: 95 mm (3‑3/4")
• Construction: bi‑metal (high‑speed steel teeth with flexible backing)
• Recommended tools: compatible with standard drill arbors, suitable for hand drills and drill presses
• Typical material capability: wood, plywood, laminates, thin to medium‑gauge metals
• Intended use: through holes for pipes, conduits, fittings and general installation openings

How to use

Mount the hole saw on a suitable arbor or mandrel that is compatible with your drill. Securely tighten the arbor and ensure the pilot bit is centered. Select an appropriate drilling speed based on the material: lower speeds for metals and higher speeds for wood. Apply steady, moderate pressure and let the cutting teeth do the work; avoid excessive force that may overheat the tool. For metal cutting, use cutting fluid or lubricant to reduce heat buildup. After completing the cut, retract the saw and remove any slugs or debris from the teeth before storing.

Usage recommendations

For best results, use appropriate personal protective equipment, clamp the workpiece where possible, and match drill speed and lubrication to the material being cut. Inspect the saw teeth before use and replace the hole saw if excessive wear or tooth damage is present.