SKU: 89320537986

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

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Description

Bosch HBT387 3-7/8 Inch Bi-Metal Hole Saw M42 Cobalt Alloy 5 TPI Progressor Tooth for Wood Metal and PlasticDURABLE 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 Boschs 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

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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 89320537986

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4.5 ★★★★★
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terry lee
Charlottesville, US
★★★★★ 5
My best office chair!
Color: Black
I haven't really given a lot of reviews before. But that said I weighed 260 at 6 ft 3 in. I have to admit this is a pretty comfortable chair! It was easy to put together, and my legs don't go to sleep anymore sitting in an office chair The lumbar support is really good. I'm just glad I was able to find this chair, and about my son another one and it'll be here Friday! You can't go wrong with this chair! I love it so far!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
C
Verified Purchase
cpuapprentice
Pawtucket, US
★★★★★ 4
Replacement chair
Color: Black
Good replacment chair comfortable, I only had it a few months am happy with quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
C
Verified Purchase
chuck
Grantham, US
★★★★★ 5
while big and wide seat....
Color: Black
while big and wide seat is nice this chair has just seemed off since i got it, it seems like it only reclines part way and it feels like it is leaning forward in normal sitting position and one of the wheels fell off the mini ball bearings fell out of the swivel part of the wheel and left the wheel unstable only to fall off. while the actual seat of this chair is big and wide (not so comfy) the mount seems off and cant recline all the way back like in old chairs, the wheel thing suck but i can replace a wheel could have been much higher quality for what i paid for the chair. UPDATE: over the past few weeks customer service reached out to me about the chair and fully addressed all of my concerns, to my surprise they offered to replace the chair at no cost to me. The new chair is much better than the old one everything seems good to go and i got upgraded wheels that dont have that same type of ball bearing, so i dont think these wheels will be an issue. Thanks to the customer support member Luka that reached out to me and made everything correct.
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Reviewed in the United States on October 16, 2024
K
Verified Purchase
Keenen D Fields
Charlottesville, US
★★★★★ 3
Nice Chair but it does not work for long.
Color: Black
This is a very good chair when you buy it. Comfortable and fits bigger people well. The issue is that you only get to enjoy it for one year. After one year of very light use the main seat piston that adjusts high has already failed leaving my chair stuck at the lowest height. I could not imagine how fast it would have failed if I used it a lot. I did not even sit in this chair more than 3 days a week for 2 hrs. I am nowhere near the weight limit for the chair. It just does not last.
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Reviewed in the United States on May 27, 2026
A
Verified Purchase
Anthony B. Frazier
Lowell, US
★★★★★ 5
Perfect fit.
Color: Black
I'm so comfortable. Extremely sturdy and great rubber wheels for a smooth glide.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026

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