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Bosch 85218M 3/8-In. x 1/2-In. Carbide-Tipped Rabbeting Bit
Product guide

Bosch 85218M 3/8-In. x 1/2-In. Carbide-Tipped Rabbeting Bit

The Bosch 85218M is a carbide-tipped rabbeting bit listed in a 3/8-inch by 1/2-inch size. Bosch describes this bit type as making rabbets without a router guide, while the listing also identifies a 1/4-inch shank in its included-components text.

At a glance

  • Described as a control-cut micrograin carbide rabbeting bit for making rabbets without a router guide.
  • The listing specifies a 0.5-inch cutting length and two flutes.
  • Bosch describes its router-bit range as using a shear-angle cutting edge for work in plywood and other materials.
Price
$22.69Save 21%

Reference price: $28.66

Price checked: Nov 14, 2026

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Pros and cons

Pros

  • The rabbeting design is described for cutting without a router guide, which can simplify setup for the intended cut.
  • A stated two-flute count and cutting length help buyers compare it with bits suited to their router and project.

Technical specifications

9 specifications
Identity
BrandBosch
Model85218M
Size and cutting
Listed size3/8 In. x 1/2 In.
Cutting length0.5 inches
Item diameter0.38 inches
Cut typeCarbide-Tipped Cut
Number of flutes2
Materials and dimensions
Material listedBlend
Weight listed2.7 ounces

What to know before buying

Listing details to confirm

The title and size field give 3/8 In. x 1/2 In., while the included-components text describes a 3/8-inch bit with a 1/4-inch shank. The listed 0.38-inch item diameter and 0.5-inch cutting length do not clarify which dimension the title's 1/2 inch denotes, so confirm the required cut and shank fit before purchase. The material field says Blend although the title says carbide-tipped. These listing details are inconsistent, not proof of a product defect.

What’s in the box

Included
  • Rabbeting bit, 3/8-inch
  • 1/4-inch shank with ball bearing
  • Carbide-tipped cutting component

Who is it for?

A good fit for

  • Woodworkers making rabbets who want a bit described for use without a router guide.
  • Buyers whose router accepts the listed 1/4-inch shank, after confirming the intended diameter and cut dimensions.

Less suited to

  • Buyers who need confirmed dimensions for a particular rabbet or router setup without first resolving the listing's dimension ambiguity.

Customer reviews on Amazon

4.8 / 5 · 13 ratings
  • 5 stars77%77%
  • 4 stars23%23%
  • 3 stars0%0%
  • 2 stars0%0%
  • 1 star0%0%

The supplied aggregate ratings lean positive, with ratings limited to the four- and five-star categories. They indicate generally favorable impressions but do not explain what customers valued or establish how the bit performs. Buyers should use the stated cutting details and resolve the dimension ambiguity against their project needs.

Frequently asked questions

What kind of cut is the Bosch 85218M intended for?

It is identified as a rabbeting bit. Bosch describes carbide-tipped rabbeting bits as making rabbets without a router guide.

What shank size is listed?

The included-components text specifies a 1/4-inch shank. Confirm this against the selected listing and your router before buying.

Are the dimensions fully clear?

No. The title gives 3/8 In. x 1/2 In., while other listing details specify a 0.38-inch diameter, 0.5-inch cutting length, and 1/4-inch shank. Confirm the exact dimensions you need.

Alternative options

Product details in Markdown