PCD 2 Flute Slot Drill

I would not call them more fragile but you need to think about what you are asking each tooth to do: On a slot drill you have half as many teeth

Slot drills are also known as slot mills and are generally a two fluted and flat-ended double-cutting tool with two radial cutting edges

slot hercules Milling Cutter, End Mills, Slot Drills, Ball Nose, Long Series, 2 flute 3 flute 4 flute

slot xo game Ninja trick for chain drilling: Lay out an odd number, drill the odds first then the evens That way the material on either side of the hole