Studio view of the white Bosch HBT375 3-3/4 inch bi-metal hole saw featuring the red Bosch logo and triangular side slots.
Infographic highlighting the hole saw's key features: triangle slot design, enhanced M42 alloy, progressor tooth design, reinforced shoulders, and a deeper cup.
Action shot of a worker using a Bosch cordless drill and the white hole saw to cut into a gray metal electrical panel box.
Close-up of gloved hands attaching the white hole saw to a pilot bit and arbor assembly against a wooden background.
Macro view of the hole saw's cutting edge, showcasing the sharp, alternating bi-metal progressor tooth geometry.
High-angle action shot of the hole saw drilling a clean hole into a beige interior door panel, with wood shavings visible on the surface.
A worker using a Bosch drill and the white hole saw to cut a hole in a white countertop surface.
Close-up action shot of the hole saw cutting into the side of a metal electrical enclosure, highlighting the tool's metal-cutting capability.
Studio view of the white Bosch HBT375 3-3/4 inch bi-metal hole saw featuring the red Bosch logo and triangular side slots.
Infographic highlighting the hole saw's key features: triangle slot design, enhanced M42 alloy, progressor tooth design, reinforced shoulders, and a deeper cup.
Action shot of a worker using a Bosch cordless drill and the white hole saw to cut into a gray metal electrical panel box.
Close-up of gloved hands attaching the white hole saw to a pilot bit and arbor assembly against a wooden background.
Macro view of the hole saw's cutting edge, showcasing the sharp, alternating bi-metal progressor tooth geometry.
High-angle action shot of the hole saw drilling a clean hole into a beige interior door panel, with wood shavings visible on the surface.
A worker using a Bosch drill and the white hole saw to cut a hole in a white countertop surface.
Close-up action shot of the hole saw cutting into the side of a metal electrical enclosure, highlighting the tool's metal-cutting capability.
BOSCH

Bosch HBT375 3-3/4 Inch Bi-Metal Hole Saw M42 Cobalt Alloy 5 TPI Progressor Tooth for Wood Metal and Plastic

Only 3 left
SKU: HBT375
$13.99

Description

ROBUST M42 COBALT CONSTRUCTION FOR DEMANDING CUTS

Experience superior durability and precision with the Bosch HBT375 3-3/4 Inch Bi-Metal Hole Saw. Designed to withstand the rigors of professional use, this hole saw is crafted from Bosch’s enhanced M42 alloy material containing 8% cobalt. This premium composition provides excellent heat resistance, allowing the blade to stay sharper for longer even in high-temperature applications. Whether you are cutting into metal, stainless steel, wood, plastic, or drywall, this tool delivers the consistent performance and longevity needed for complex installations.

The HBT375 is engineered for efficiency on the job site. It utilizes the advanced "Progressor" tooth design with a 5 TPI configuration, ensuring faster cutting speeds and cleaner entry and exit holes. The innovative triangle "shark tooth" side slots effectively dissipate heat and solve the common issue of stuck plugs, making debris removal fast and effortless. Featuring a reinforced shoulder for added strength against high torque and a deep 1-3/4 inch cup to accommodate thicker materials, this hole saw is built to handle the toughest tasks with ease.

Key Features

  • M42 Cobalt Alloy: Contains 8% cobalt for superior heat resistance and up to 20% longer life in tough materials.
  • Progressor Tooth Design: Alternating tooth sizes (5 TPI) ensure faster cutting speeds and cleaner holes.
  • Triangle Slot Design: "Shark tooth" side slots allow for easy plug ejection and improved heat reduction.
  • Reinforced Shoulder: Adds structural strength to the base to prevent failure under heavy loads.
  • Deep Cup Capacity: 1-3/4 inch depth allows for drilling through thicker materials like 2x lumber and composite layers.
  • Multi-Material Versatility: Optimized for cutting wood, metal, plastic, drywall, and stainless steel.
  • Universal Compatibility: Works with standard large-diameter mandrels and SpinLOCK universal arbors (sold separately).

What's Included

(1) 3-3/4 Inch Bi-Metal Hole Saw (Arbor/Mandrel Sold Separately)

Specifications

Manufacturer Bosch
Model Number HBT375
Saw Diameter 3-3/4 in.
Max Cutting Depth 1-3/4 in.
Teeth Per Inch (TPI) 5
Blade Material Bi-Metal M42 (8% Cobalt)
Tooth Design Progressor
Arbor Included No (Requires Large Mandrel)
Applications Wood, Metal, Plastic, Drywall
Side Slots Triangle (Shark Tooth)
Package Quantity 1

Pro-Tip: To extend the life of your hole saw when drilling through metal, operate your drill at a lower RPM and apply a cutting fluid. This reduces friction and heat buildup, which helps preserve the cobalt teeth and ensures a smoother cut.