Description of Dewalt 64 Inch Ferrous Oxide DW1925
Pilot Point Tip starts on contact for clean, accurate holes and reduces lock-up on breakthrough. No-Spin Shank eliminates the frustration of bit spinning in the chuck. Tapered web provides greater durability to reduce breaking. Size markings are located above the shank to prevent wearing away. For drilling in wood, metal, or plastic. Pilot point tip starts on contact for clean, accurate holes and reduces lock-up on breakthrough. No-spin shank eliminates the frustration of bit spinning in the chuck. Tapered web provides greater durability to reduce breaking. Size markings are located above the shank to prevent wearing away. Note: Sizes 1/16-inch to 11/64-inch are split point drill bits; Std Jobber Length Fractional Sizes.
Drilled 72 holes in a 1/4 inch angle iron and cut the 72nd hole almost as easily as the 1st hole. I confess that I used a lot of coolant in the process. and did all drills at 1-2 second intervals to reduce heat build-up, however I had less success with the more expensive drills.
Perfect for my application (cross dowel drilling for smaller 3/8" dowels that should be removable). Beaten oak like butter. I tried not to push through 100% to avoid having to just let the pilot tip break through the surface on the exit side, flip the job and finish drilling.
I think the pilot part of these drills is absolutely not worth it. I was trying to find a good deal on Amazon and came across this product. I thought it would be ok but the square tip makes it very difficult to cut bad threads for the spiral coil. On a drill press this would probably be fine since you can work slowly. I'm pretty sure a standard bit would be the way to go for me. I've also drilled through fiberglass and it's still wandered. I no longer get a pilot grade. I'm not a drill expert…