Mollom 100mm (3-15/16") Carbide Hole Saw — Heavy-Duty Titanium-Plated Cutter with 2 Pilot Bits for Metal

Mollom's 3-15/16" (100mm) heavy-duty carbide hole saw is a tungsten-carbide-tipped cutter designed to drill fast, clean holes through hard metals, steel, and general sheet materials while including two pilot bits for reliable centering and slug ejection.

This 100mm hole saw combines 21 tungsten-carbide teeth and a thick, titanium-plated body to deliver long life and consistent performance on demanding projects. Its 10mm (3/8") shank fits common arbors, and the included spring-loaded pilot bits speed up work by ejecting the cut slug. Built for bench, magnetic, or hand drills, Mollom engineered this cutter for tradespeople and serious DIYers who need a burr-free, heavy-duty solution for metal and other tough sheets.

How does this hole saw handle hard metal and stainless steel?

The Mollom hole saw uses tungsten-carbide-tipped (TCT) teeth that are significantly harder than standard bi-metal teeth, letting it cut through thicker, tougher metals with less wear. It is rated to bore thin stainless plates and has a lifespan many times longer than conventional hole saws.

• 21 tungsten-carbide teeth for faster, aggressive cutting
• Titanium-plated, cemented carbide construction resists rust and abrasion
• Can bore thin stainless (up to approximately 0.1" where conditions allow)
• Longer service life than standard bi-metal saws under similar loads

What drilling setup and pilot bits are included, and how do they help?

The product comes with two pilot bits—a titanium-plated pilot and a stepped pilot—plus a spring-loaded system that ejects the slug after cutting. The 10mm (3/8") shank is compatible with many arbors and drill types, making the saw adaptable for workshop or field use.

• Titanium-plated pilot for corrosion resistance and precise centering
• Step pilot option for progressive engagement and easier starts
• Spring-loaded pilot ejects the slug, reducing downtime and cleanup
• 10mm shank fits common drill chucks and arbors for versatile mounting

Which materials can I safely cut, and what should I avoid?

This carbide hole saw is intended for hard metals, stainless steel plate, square tubing, cast iron, iron, certain plastics, wood, and fiberglass-reinforced plastics (FRP). It is not appropriate for masonry applications like concrete, tile, or stone—those materials require dedicated masonry bits or diamond tools.

• Ideal: sheet metal, steel, cast iron, tubing, wood, FRP
• Avoid: concrete, ceramic tile, natural stone, or masonry
• Use proper speeds, coolant or cutting oil for metal work to extend life
• Ensure secure clamping and correct pilot selection for safety and precision

Who is this for? Tradespeople, metal fabricators, HVAC installers, electricians, and experienced DIYers who need a robust hole saw for demanding applications will appreciate the Mollom 100mm carbide cutter. If your work routinely involves cutting hard metal plates, tubing, or mixed-material enclosures and you want cleaner, faster holes with less wear on tooling, this heavy-duty TCT hole saw set is built to handle that workload. Note: follow safe drilling practices, use appropriate speeds and lubricant for metal, and do not use on masonry.