A studio shot of the white 4-inch Bosch HBT400 bi-metal hole saw, showing its Progressor tooth design and triangle plug removal slots.
An informational graphic of the Bosch bi-metal hole saw with callouts pointing to key features: "TRIANGLE SLOT DESIGN," "ENHANCED M42 ALLOY," "PROGRESSOR TOOTH DESIGN," "REINFORCED SHOULDERS," and "DEEPER CUP."
A gloved hand uses a Bosch drill with an auxiliary handle and a white bi-metal hole saw to drill a hole in the side of a metal electrical panel.
A person wearing work gloves is shown inserting the arbor of a Bosch bi-metal hole saw into the chuck of a cordless drill.
A close-up view of the Progressor tooth design on the Bosch bi-metal hole saw, showing the alternating sizes of the cutting teeth.
A Bosch drill with a white bi-metal hole saw is shown drilling a hole for a doorknob in a white, six-panel wooden door.
A person uses a Bosch drill with a white bi-metal hole saw to drill a hole through a white laminate countertop, with the wood plug resting nearby.
A gloved hand uses a Bosch drill with an auxiliary handle and a white bi-metal hole saw to drill a hole in the side of a metal electrical panel.
A studio shot of the white 4-inch Bosch HBT400 bi-metal hole saw, showing its Progressor tooth design and triangle plug removal slots.
An informational graphic of the Bosch bi-metal hole saw with callouts pointing to key features: "TRIANGLE SLOT DESIGN," "ENHANCED M42 ALLOY," "PROGRESSOR TOOTH DESIGN," "REINFORCED SHOULDERS," and "DEEPER CUP."
A gloved hand uses a Bosch drill with an auxiliary handle and a white bi-metal hole saw to drill a hole in the side of a metal electrical panel.
A person wearing work gloves is shown inserting the arbor of a Bosch bi-metal hole saw into the chuck of a cordless drill.
A close-up view of the Progressor tooth design on the Bosch bi-metal hole saw, showing the alternating sizes of the cutting teeth.
A Bosch drill with a white bi-metal hole saw is shown drilling a hole for a doorknob in a white, six-panel wooden door.
A person uses a Bosch drill with a white bi-metal hole saw to drill a hole through a white laminate countertop, with the wood plug resting nearby.
A gloved hand uses a Bosch drill with an auxiliary handle and a white bi-metal hole saw to drill a hole in the side of a metal electrical panel.
Bosch

Bosch HBT400 4-Inch Bi-Metal M42 Hole Saw 8% Cobalt Progressor Tooth Design Triangle Slot for Wood Metal and Plastic

Only 1 left
SKU: HBT400
$24.99
$33.79 Sale $24.99
Description

The 4-Inch Hole Saw That Cuts Faster and Lasts 20% Longer

The Bosch HBT400 4-Inch Hole Saw is a professional-grade accessory built for speed, durability, and easy use. It’s engineered with an enhanced M42 alloy that contains 8% cobalt, allowing it to withstand high-temperature applications and deliver 20% more life than standard bi-metal hole saws. This is the ideal solution for plumbers, electricians, and remodelers who need to drill clean, fast holes in wood, metal, drywall, and plastic.

What sets this hole saw apart is its smart design. The Progressor tooth design features alternating teeth sizes that cut faster and last longer. A unique triangle slot design provides better plug removal efficiency and reduces heat buildup. Combined with a deeper 1.75-inch cup for drilling through thicker materials and a reinforced shoulder, this hole saw is built to perform, hole after hole.

Key Features

  • Enhanced M42 Alloy: Contains 8% cobalt to withstand high temperatures and deliver 20% more life.
  • Progressor Tooth Design: Alternating teeth size cuts faster and lasts longer in wood, metal, and plastic.
  • Triangle Slot Design: Improves plug removal efficiency, reduces heat, and allows for easy plug ejection.
  • Deeper 1.75" Cup: Can drill through thicker materials in a single pass.
  • Reinforced Shoulders: Provide added strength and longer life to the hole saw cup.

What's Included

  • (1) 4 In. Bi-Metal M42 Hole Saw (HBT400)

Specifications

Brand Bosch
Model Number HBT400
Hole Saw Diameter 4 in
Drilling Depth 1.75 in
Material Bi-Metal (M42 with 8% Cobalt)
Tooth Design Progressor (Alternating)
Plug Removal Slot Triangle Slot Design
Application Wood, Metal, Drywall, Plastic
Shoulder Design Reinforced
Self Feeding No
Case Included No

Pro Tip

For the best results in metal, use a slower drill speed and cutting oil to maximize blade life. In wood, a higher speed will clear chips efficiently. The triangle slots are perfect for prying out plugs—just use a small screwdriver to pop the plug out from the side.