Guide · Insert and reducer rings
Insert ring set sizes by system: a lookup table
A lookup table of the ring openings JessEm, Kreg, Woodpeckers, INCRA, POWERTEC and Bosch list, by system, so you can see what your plate has and what a set adds.
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Short answer
This is a lookup table of the ring openings each maker lists, grouped by system. Find your plate or lift to see which rings it came with, then look at the add-on set in the same system to see what it adds. A set fits only its own maker's system.
Read this first
Every row below belongs to one maker's ring system. A Kreg ring is for Kreg plates, a Woodpeckers ring for Woodpeckers plates, and so on. No maker in our sources says its rings fit another system. If you are not sure which system you have, start with how to identify your ring system.
The lookup table
| System | Plate, lift or set | Openings the maker lists |
|---|---|---|
| JessEm | Mast-R-Lift II (current product page) | 1-3/8, 2 and 2-1/2 in[1] |
| JessEm | Rout-R-Plate | 1-3/8, 2 and 2-1/2 in[2] |
| JessEm Tab-Lock | 8-piece add-on set | 3/8, 1/2, 3/4, 1, 1-1/4, 1-1/2, 1-3/4 and 2-1/4 in[3] |
| Kreg Level-Loc | PRS5000 lift | 1 in (25 mm), 1-3/16 in (30 mm), 2-5/8 in (67 mm)[4] |
| Kreg Level-Loc | PRS4034, PRS4036, PRS4038 plates | 1, 1-3/16 (guide-bushing ring) and 2-5/8 in[5] |
| Kreg Level-Loc | PRS3050 add-on set | 3/4, 1-3/8, 1-5/8 and 2-1/8 in (19, 35, 41, 54 mm), plus a blank[6] |
| Woodpeckers Twist Lock | Cast aluminum plate | 1, 1-3/16 and 2-5/8 in[7] |
| Woodpeckers Twist Lock | TLRSET-ML add-on set | Solid, 3/4, 7/8, 1-3/8, 1-5/8, 1-7/8, 2-1/8 and 2-3/8 in[8] |
| INCRA MagnaLOCK | MLRINGSET-3.5 | 3/8, 5/8, 7/8, 1-3/8, 1-5/8, 1-7/8, 2-5/8 and 3-3/8 in[9] |
| INCRA CleanSweep | Steel rings | 3/8, 5/8, 1, 1-3/8, 1-5/8 and 1-7/8 in (inside diameters)[10] |
| POWERTEC | 71850 plate | Solid, 1, 1-7/8 and 2-5/8 in[11] |
| Bosch | RA1181 table | 1, 2 and 2-3/4 in[12] |
JessEm's Mast-R-Lift II manual says the lift comes with one 2 in ring.[13] The three-ring list above is from JessEm's current product page, read on 2026-10-13.[1]
INCRA's generation limit
INCRA says its CleanSweep rings fit only 2006-or-newer INCRA plates and lifts with a 3-5/8 in opening through the bottom of the plate. They do not fit gray phenolic MagnaLOCK plates or first-generation gold Mast-R-Lifts with a 3-1/2 in opening.[10] INCRA's MLRINGSET page holds the eight rings in the plate with four rare-earth magnets.[9]
What an add-on set fills in
Reading across the table shows the gaps each set closes:
- Kreg: the plates and lift come with 1, 1-3/16 and 2-5/8 in. The PRS3050 adds a 3/4 in ring for small bits and 1-3/8, 1-5/8 and 2-1/8 in steps in between.
- Woodpeckers: the plate comes with 1, 1-3/16 and 2-5/8 in. The TLRSET-ML adds a solid ring, a 3/4 and 7/8 in for small bits and five steps from 1-3/8 to 2-3/8 in.
- JessEm: the lift and Rout-R-Plate come with 1-3/8, 2 and 2-1/2 in. The Tab-Lock set adds eight rings from 3/8 to 2-1/4 in, which JessEm says fit plates and lifts with the Tab-Lock system.[3]
To choose the opening for a given bit, see which ring opening for your bit diameter.
Materials, where the maker states them
| Set | Material the maker states |
|---|---|
| Kreg PRS3050 | Plastic polymer, with a molded storage tray[6] |
| Woodpeckers TLRSET-ML | Polycarbonate-reinforced ABS[8] |
| INCRA CleanSweep | Laser-cut steel[9] |
| JessEm Tab-Lock 8-piece | Not named on the set's page |
| INCRA MLRINGSET-3.5 | Not given on the set's page |
The blank ring
Kreg's PRS3050 includes one blank ring, which Kreg describes as for making a custom opening.[6] Woodpeckers' set has a solid ring too.[8] We give no cutting steps; follow the maker's instructions.
Add-on sets for a named system
Picks that fit2 products
Kreg PRS3050 5-piece set: Kreg Level-Loc insert plates (PRS4034, PRS4036, PRS4038) and the Kreg PRS5000 lift only.
More on choosing
Woodpeckers TLRSET-ML 8-piece set: Woodpeckers Twist Lock plates and lifts only. On Amazon, check that Ships from / Sold by is Amazon.com or the brand.
Kreg Level-Loc plates and lift
Woodpeckers Twist Lock plates and lifts
Next
Questions
What sizes come in a router ring set?
It depends on the maker and system. Kreg's PRS3050 adds 3/4, 1-3/8, 1-5/8 and 2-1/8 in plus a blank; Woodpeckers' TLRSET-ML has a solid ring and seven openings from 3/4 to 2-3/8 in; INCRA's MLRINGSET-3.5 runs from 3/8 to 3-3/8 in.[6][8][9]
Which set adds a 3/4 in ring for my Kreg plate?
Kreg's PRS3050 Level-Loc set, which Kreg lists for its Precision Router Table Insert Plate and Precision Router Lift. Kreg's plates and the PRS5000 come with 1, 1-3/16 and 2-5/8 in rings only.[6][5]
What is a blank ring for?
Kreg says its blank Level-Loc ring is for making a custom opening. Follow Kreg's instructions for that; we give no cutting steps.[6]
Can I mix rings from two makers' sets in one plate?
No maker in our sources says so. Each set is listed for its own maker's plates and lifts.