Studio view of the white Bosch HBT387 3-7/8 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 HBT387 3-7/8 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 HBT387 3-7/8 Inch Bi-Metal Hole Saw M42 Cobalt Alloy 5 TPI Progressor Tooth for Wood Metal and Plastic

In stock
SKU: HBT387
$17.95

Description

DURABLE M42 COBALT PERFORMANCE FOR HEAVY-DUTY CUTTING

Achieve superior cutting results and extended tool life with the Bosch HBT387 3-7/8 Inch Bi-Metal Hole Saw. Engineered for the demands of professional job sites, this hole saw is constructed from Bosch’s enhanced M42 alloy material, featuring 8% cobalt. This high-grade composition provides excellent heat resistance, allowing the blade to withstand high temperatures and delivering up to 20% longer life compared to standard bi-metal saws. Whether you are drilling through tough metal, stainless steel, wood, or drywall, this tool ensures clean, precise cuts every time.

The HBT387 is designed for maximum efficiency and ease of use. It features the innovative "Progressor" tooth design with a 5 TPI configuration, which allows for faster cutting speeds and cleaner edges. The unique triangle "shark tooth" side slots effectively dissipate heat and solve the common frustration of stuck plugs, making debris removal quick and simple. With a reinforced shoulder for added strength against high torque and a deep cup to handle thick materials, this hole saw is a versatile and reliable addition to any toolkit.

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 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 mandrels and SpinLOCK universal arbors (sold separately).

What's Included

(1) 3-7/8 Inch Bi-Metal Hole Saw (Arbor/Mandrel Sold Separately)

Specifications

Manufacturer Bosch
Model Number HBT387
Saw Diameter 3-7/8 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)
Impact Rated No
Package Quantity 1

Pro-Tip: For the best results when cutting metal, operate your drill at a lower RPM and apply a cutting lubricant. This simple step significantly reduces friction, prevents the cobalt teeth from overheating, and ensures a smoother, cleaner cut while extending the life of the hole saw.