مجموعة مثاقب توسيع، ثلاثية الأسنان 82 درجة، مجموعة من 5

I needed a good set for flattening screw heads on a cabinet job, and the three-flute design on these cuts cleanly without chattering. The 1/2" shank on the larger two bits gives a solid, wobble-free feel in my drill press.

The 1/4" countersink with its 1/4" shank cut through some oak trim like butter, leaving a perfectly clean chamfer. It’s a solid set that covers most common sizes without feeling cheap.

The three-flute design cuts pretty clean in softwood, but I found the 1/2-inch shank on the larger sizes wobbles slightly in my drill press. Fine for light use, though the set covers most common screw sizes.