16 PCs M42 8% Cobalt Bi-Metal Hole Saw Set & Professional Installation Kit

Upgrade your drilling capabilities with this Professional 16-Piece Bi-Metal Hole Saw Set, engineered for high-performance cutting through the toughest materials. Forged from premium M42 High-Speed Steel with 8% Cobalt, these saws are designed to resist extreme heat and maintain a razor-sharp edge up to twice as long as standard bi-metal alternatives. Whether you are installing electrical conduits, plumbing pipes, or door hardware, this comprehensive kit provides the industrial strength and precision required for a clean, burr-free finish every time.

Core Utility & Performance Features

• M42 8% Cobalt Construction: The addition of 8% Cobalt provides superior hardness and thermal resistance. This allows you to power through difficult materials like thin stainless steel, aluminum, and dense hardwoods without the teeth dulling or overheating.

• Rapid-Clear Tooth Geometry: Featuring a 4/6 TPI variable tooth pitch, this set is optimized for aggressive cutting with minimal vibration. The unique ejector slots facilitate instant chip removal, preventing clogging and ensuring a smoother, faster drilling experience.

• Professional Cutting Depth: With a maximum depth of 48mm (1.89"), these saws easily handle thick plywood, PVC boards, and composite materials, making them ideal for deep-bore installations in cabinetry and construction.

• Heavy-Duty Multi-Material Versatility: This "one-kit" solution is perfect for a vast array of job site materials, including:

  • Metals: Aluminum, copper, and thin-gauge steel.

  • Construction: Plywood, drywall, and particle board.

  • Plastics: PVC, acrylic, and synthetic composites.

• Complete Installation Hardware: Includes two universal arbors (3/8" and 7/16"), pilot drills for pinpoint centering, and an adapter nut, ensuring compatibility with almost any standard handheld or bench-top drill.

Technical Specifications

• Material: M42 Bi-Metal (8% Cobalt HSS)

• Tooth Pitch: 4/6 TPI Variable

• Cutting Depth: 48mm (1.89")

• Shank Type: Hex Drive Arbors

• Size Range: 19mm to 64mm (Includes popular sizes like 3/4" to 2-1/2")

• Total Weight: 2kg (Includes heavy-duty case)

Comprehensive Kit Contents

• 10-12 Hole Saws: Covering all essential diameters for trade installations.

• 2 x Universal Arbors: Designed for rapid mounting and secure torque transfer.

• Pilot Drill Bits: For high-accuracy starting and centering.

• Accessories: Hex key, adapter nut, and installation plate.

• Storage: Rugged, impact-resistant carrying case with labeled inserts.

Snagg It Tip

When cutting through metals or thick hardwoods, use a steady, medium-speed RPM and let the Cobalt teeth do the work—excessive pressure can generate unnecessary heat. For the cleanest exit on the back of a board, stop drilling as soon as the pilot bit pokes through the other side, then flip the material and finish the hole from the back. This "flip-cut" technique ensures a perfectly smooth finish with zero splintering. To maintain the life of your kit, a small drop of cutting oil when working with metal will keep the M42 edges cool and maintain that "out-of-the-box" sharpness for years.