1/2インチ キーホールビット x 1/4インチシャンク – Whiteside 3052（AstraHPコーティング）

Cutting keyhole slots with this bit leaves a clean finish, and the 1/4″ shank fit snugly in my router collet without any wobble. The smaller diameter handled the screw shanks perfectly for my picture frame project.

That AstraHP coating is the real deal—I cut a dozen plywood keyhole slots today and the bit still feels brand new. The 1/4" shank is a perfect fit for my router, no wobble or chatter at all.

I’ve been using this bit to cut screw slots for some drawer pulls, and the AstraHP coating is holding up way better than uncoated bits I’ve used in the past. It cuts cleanly through hardwood without burning, and the 1/2″ keyhole matches perfectly with standard screws. Really glad I switched to this