The Carbide Compact Router uses the same collets and nuts as the Makita RT0701.
In addition to our precision collet set:
there are collets available from a 3rd party:
(as well as a 3/8" from Makita: Makita USA - Product Details -763619-3 )
It should take a 13mm low profile and 22mm stubby wrench:
- 13mm — note that this must be low profile.
- https://www.amazon.com/gp/product/B0791ZS89G
- https://www.homedepot.com/p/Husky-Thin-Head-Access-Wrench-Set-6-Piece-H100THCW6PCSM/305713153
- Bicycle cone wrenches work as well such as the 13mm Park Tool PT-09 Shop Cone Wrench
- Asahi low profile 11/13mm wrench
- McMaster-Carr Tight-Clearance Open-End Wrench with Black Finish, 13 mm Size, 4" Overall Length (sourced from Martin as of mid-2020)
- 22mm — a stubby wrench is well-suited for this, and handier due to the low torque requirements
The DeWalt uses a different style of collet, and the ER-11 collets are different as well.
We have developed a version which takes ER-11 collets which will hopefully be available soon: