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Quick verdict
Choose the Freud 75-100 Up Spiral Bit, 1/8-Inch if you want center-cutting end allows plunging directly into the surface without a pilot hole. Choose the Freud 75-103 Up Spiral Bit, 1/4-Inch if you'd rather have a common everyday diameter for stopped grooves and shallow mortises. Overall we rank the Freud 75-100 Up Spiral Bit, 1/8-Inch higher: #1 versus #3 in our Best Plunge Router Bits 2026 list.
Winner overall: Freud 75-100 Up Spiral Bit, 1/8-Inch
Freud 75-100 Up Spiral Bit, 1/8-Inch vs Freud 75-103 Up Spiral Bit, 1/4-Inch compared
Every difference that matters, in one table.
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- Best Plunge Router Bits 2026
- Freud 75-100 Up Spiral Bit — 1/8-Inch review
- Freud 75-103 Up Spiral Bit — 1/4-Inch review
- All woodworking
Bottom line
Choose the Freud 75-100 Up Spiral Bit, 1/8-Inch if you want center-cutting end allows plunging directly into the surface without a pilot hole. Choose the Freud 75-103 Up Spiral Bit, 1/4-Inch if you'd rather have a common everyday diameter for stopped grooves and shallow mortises. Overall we rank the Freud 75-100 Up Spiral Bit, 1/8-Inch higher: #1 versus #3 in our Best Plunge Router Bits 2026 list.
Best OverallFreud
Center-cutting end allows plunging directly into the surface without a pilot hole
- Spiral up-cut geometry
- Center-cutting end
- TiCo carbide
- 1/4-inch shank
✓ Pros
- A common everyday diameter for stopped grooves and shallow mortises
- TiCo carbide for strong edge retention in repeated plunge cuts
- Sized for handheld routing w here a compact bit is easier to control
- A practical companion size alongside the 1/8-inch bit for a range of groove widths
✕ Cons
- Single fixed diameter -- doesn't cover wider mortises
Best Quarter InchFreud
A common everyday diameter for stopped grooves and shallow mortises
- 1/4-inch diameter
- Center-cutting
- TiCo Hi-Density carbide
- 1/4-inch shank
✓ Pros
- A common everyday diameter for stopped grooves and shallow mortises
- TiCo carbide for strong edge retention in repeated plunge cuts
- Sized for handheld routing w here a compact bit is easier to control
- A practical companion size alongside the 1/8-inch bit for a range of groove widths
✕ Cons
- Single fixed diameter -- doesn't cover wider mortises
FAQ
Common questions
Which is better, the Freud 75-100 Up Spiral Bit, 1/8-Inch or the Freud 75-103 Up Spiral Bit, 1/4-Inch?
Choose the Freud 75-100 Up Spiral Bit, 1/8-Inch if you want center-cutting end allows plunging directly into the surface without a pilot hole. Choose the Freud 75-103 Up Spiral Bit, 1/4-Inch if you'd rather have a common everyday diameter for stopped grooves and shallow mortises. Overall we rank the Freud 75-100 Up Spiral Bit, 1/8-Inch higher: #1 versus #3 in our Best Plunge Router Bits 2026 list.
What is the difference between the Freud 75-100 Up Spiral Bit, 1/8-Inch and the Freud 75-103 Up Spiral Bit, 1/4-Inch?
The Freud 75-100 Up Spiral Bit, 1/8-Inch stands out because center-cutting end allows plunging directly into the surface without a pilot hole, while the Freud 75-103 Up Spiral Bit, 1/4-Inch stands out because a common everyday diameter for stopped grooves and shallow mortises. The trade-offs differ too: the Freud 75-100 Up Spiral Bit, 1/8-Inch's ma in caveat is that up-cut spiral pulls chips upward -- some chip ejection onto the workpiece surface, and the Freud 75-103 Up Spiral Bit, 1/4-Inch's is that single fixed diameter -- doesn't cover wider mortises.
Is the Freud 75-100 Up Spiral Bit, 1/8-Inch worth it over the Freud 75-103 Up Spiral Bit, 1/4-Inch?
For most buyers, yes: it's our #1 pick. Consider the Freud 75-103 Up Spiral Bit, 1/4-Inch instead if up-cut spiral pulls chips upward -- some chip ejection onto the workpiece surface is a deal-breaker for you.
Who should buy the Freud 75-103 Up Spiral Bit, 1/4-Inch instead of the Freud 75-100 Up Spiral Bit, 1/8-Inch?
The Freud 75-103 Up Spiral Bit, 1/4-Inch suits buyers whose priorities match its strengths, while the Freud 75-100 Up Spiral Bit, 1/8-Inch is best for buyers who want the best overall package.
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