埋頭鑽/沉孔鑽

Finally got around to using these on a walnut shelf, and the transition from pilot hole to countersink is buttery smooth without any chatter. The plug counterbore depth was spot-on every time, which made hiding the screws with dowels feel almost too easy.

The three-in-one design saves so much time—drilling the pilot hole, countersink, and counterbore in one go gave me perfectly clean holes for a shelving project this weekend. The cuts were precise with zero splintering on oak plywood, which is more than I can say for my old setup.

Finally got around to using these on a walnut shelf and the pilot hole, countersink, and counterbore all lined up perfectly in one go. The clean edges meant I could drop in the plugs without any sanding touch-ups, which never happens with my old bits. Honestly, they’ve made my weekend project feel a