Kreg PRS4038 Kreg Präzisions-Frästisch-Einlegeplatte mit Level-Loc-Ringen (nicht pr
These rings simply twist into place using an included ring wrench to lock in level and flush with the plate surface. 3/8" thick (9mm) phenolic insert plate. Level-Loc Reducing Rings. Solid, Flat, and Perfectly Level Mounting Surface.