SKU: 89320537986

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

Sale price$16.16 Regular price$17.95
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.7 ★★★★★
Based on 101 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
Juan "G-man" Giraud Jr.
Fort Morgan, US
★★★★★ 4
Large coverage
Size: 1 Pack (24" x 36")
Takes one smudge to dry car.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
P
Patrick F. Mahoney
Belleville, US
★★★★★ 5
Magsafe car mount for a Tesla screen that is easy to adjust and holds the phone very well
Style: MagSafe Car Phone Holder, Style: MagSafe Car Phone Holder
I installed this mount on my 2018 Tesla Model 3 main display and it was easy to install - just loosen the wheels on the top and side clamp, put it in place and then tighten the clamps back down. There is a ball mount on the back which tightens as well that allows you to position and angle the phone mount so you can tilt it up or down or towards the driver. You can adjust the phone on the mount to where you want it - although the bar that holds the phone will hit the clamps in two spots so there are a couple of positions that don't work due to the design, but overall you can more or less put the phone where you want and and then tilt it any which way to you. The magnet connection is very firm but the phone also detaches relatively easily. The clamps so far are holding well on the screen. I really don't have a lot of complaints - except maybe that there's a couple of positions that don't work. It works well, installs quickly and easily and seems to hold well in use. I've had no problems so ar.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 25, 2025
J
JY
Battle Creek, US
★★★★★ 4
Mostly reliable to use
Style: MagSafe Car Phone Holder
It's nice to use in my car to separate out different needs like looking up a specific route while moving and the navigation is going somewhere. The magnet is pretty strong and haven't had any issues with that. However, if you dont put it in the corner of the screen to secure it at a right angle, the flat way to secure it in the middle of the top edge is not reliable at all. The weight of the phone and the angle of the mount makes it really easy to fall off the screen no matter how tight you secure it down. Fell at least a handful of times. Just put it at the corners and you'll be just fine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2025
A
A. Maker
Omaha, US
★★★★★ 2
Does not fit the Cybertruck. Will slip off due to angled backplate.
Style: MagSafe Car Phone Holder, Style: MagSafe Car Phone Holder
It does not fit the Cybertruck well. Due to the angled monitor back, it will slide off. Check the video of what I mean. It is not flat like the Model 3 or Ys. The mount should work fine on the Model 3 and Model Y and Newer Model S and X, but not on the Cybertruck and older vertical screen Model S and X. The Magsafe that I received must of been broken. It completely fell apart. Everytime I put on phone on it, the Magsafe will completely come off stuck to my phone.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 30, 2025
J
JR@CA
Lexington, US
★★★★★ 3
Looks good, installs easily but the arm jitters on the road
Style: MagSafe Car Phone Holder, Style: MagSafe Car Phone Holder
Super easy and intuitive to install on my Tesla model 3. Once installed, I think it will probably hold position indefinitely. You can install it so that it is in a very convenient position. my right hand index finger was able to touch the screen of my phone while maintaining contact with the handle, so that should give you an idea. The reason I took 2 stars off is the way the goose neck jitters when driving. I think perhaps it is too thin. I drove on normal paved road, and the shakes were noticeable. It didn’t fall off at any point, but it made me nervous that it might. The magnet didn’t feel that strong either. A lot of people own phones larger and heavier than mine (iPhone 12 mini), so I’m reluctant to recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 26, 2025

recommand products