Bi-Metal Hole Saw set 8 Pieces 22-68 mm, HSS M3 Teeth, 2 Adapters, Pilot Bit, 38 mm Drilling Depth, 4/6 TPI, Alloy Spring Steel, Proline

Quick Facts

• Hole Saw Set Bi-Metal 8 Pieces 22-68mm, HSS M3, Adapters, Pilot Bit
• Category: Tools
• Brand: Proline
• Model Number: 27491
• Material: HSS M3 High-Speed Steel, Alloy Spring Steel
• Number of Hole Saws: 8 pcs
• Sizes: 22, 25, 30, 35, 40, 51, 60, 68 mm
• Tooth Pitch: Variable 4/6 TPI
• Drilling Depth: 38 mm
• Mount: Hexagon or SDS-plus Adapter
• Included: 2 Adapters, Pilot Bit, Hex Key, Bushing
• Package: Plastic Case

Specifications

What does bi-metal mean?

Bi-metal means the hole saw has teeth of one material (HSS M3 high-speed steel) welded to the body of another (spring steel), providing the best properties from both.

Why is wet drilling needed in steel?

Wet drilling with cutting fluids cools the hole saw, reduces friction, and significantly extends service life when drilling in harder steel.

What is 4/6 TPI?

TPI stands for Teeth Per Inch. Variable 4/6 TPI means tooth spacing varies, providing smoother cutting in different materials.

Do all adapters fit all drills?

The set includes adapters for both standard hexagon chuck and SDS-plus, covering most common drills.

Can I drill in stainless steel?

Yes, but stainless steel is much harder. Use low speed, plenty of coolant, and expect longer drilling time.