Amazon has
5-Piece IRWIN Countersink Drill Bit Set for Metal (1877793) on sale for
$21.49.
Shipping is free w/ Prime or on orders of $35 or more.
Thanks to community member
FoxWit096 for finding this deal.
Product Details:
- Precision Ground 82° Tip For Countersinking Most Machinable Metals, Wood, And Plastic
- Made From Industrial Grade High Speed Steel For Increased Durability
- Includes A Black Oxide Finish For Added Corrosion Resistance
- Five-Flute Design Reduces Vibration For Smoother Drilling And Extended Life
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Thanks for the info. Bought this deal and IRWIN SPEEDBOR Drill Bit Set for Wood, 4-Inch, 6-Piece with some filler piece to qualify for $10 off.
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You're probably better off with the Amana set - if the expense is palatable. These are meant for metal, do not cut a pilot hole, and would need a drill press with a depth stop for any hope of control. The upside on the Amana is carbide tips which are of limited (if any) use in metal (the feed pressure is too low...), but will have very good longevity in wood projects.