1/4インチ アップカットスパイラル フラッシュトリムルータービット (AstraHPコーティング)

The up-cut spiral design shears through plywood like butter, leaving a glass-smooth edge on my template work. I used it on a curved laminate countertop and the bearing followed perfectly with zero burning or chatter.

Bottom bearing tracked the template perfectly, no grab or chatter even on a curved edge. The up-cut spiral left a smooth finish that needed almost no sanding afterward.

The up-cut spiral cleared chips so fast that I didn’t have to stop mid-pass on a long oak edge, and the bearing stayed true the whole cut. It’s a bit pricier than basic bits, but the finish left zero fuzz for a 5-star trim job.