3/16インチ コーブルータービット x 1/4インチシャンク – Whiteside 1800A (AstraHPコーティング)

Used it to cut a small cove on a walnut shelf and the finish came out glass-smooth without any burning. The AstraHP coating really does seem to keep the bit cleaner longer than my uncoated ones.

First router bit I've owned where the AstraHP coating actually seems to make a difference — it's still slicing clean after a few dozen feet of oak trim. The 1/4-inch shank fit my trim router perfectly with zero wobble.

Cut a batch of 3/16" coves in some red oak for a picture frame and the edges came out glassy smooth with zero burn marks. The 1/4" shank seated perfectly in my trim router, no wobble at all.