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Irwin Industrial Tool .25In. X 12In. Aircraft Extension High Speed Steel Fractional

Q: Is this bit for drilling through 1/2 inch hard steel ?

I drilled 120 holes thru 1/2 “ cold roll and drill was as sharp when done

Q: I'm looking at the 3/8x12" bit, will it drill through 7" thick wood?

This bit will drill thru 7" thick wood, but it will take extra steps. The flutes on the bit, which will fill with wood chips as you drill, must be cleaned often. So once the fluted part of the drill is in the wood and you've removed all wood in the flutes, you will drill approximately 3/4 inch, remove the bit from the wood, clean wood from the fluted portion of the bit, insert the bit into the wood and drill another 3/4 inch, remove the bit.....and continue repeating this process until the hole penetrates the full thickness of the wood. The flutes are about 1-1/2 long, leaving 5-1/2 inches to be drilled using the drill and remove procedure. 5-1/2 divided by 3/4 is 7.3. So you'll need to drill and remove between 7 and 10 times before fully penetrating the wood. If it were me, I'd buy a auger type 3/8" bit. It self feeds, it cuts wood faster and you'll likely only need to remove it from the wood for cleaning a couple times.These bits are also available on Amazon.

Q: Needing to drill a frame to mount a hitch. What hole sizes should I graduate to, before using the 5/8"?

I would suggest 3/8, then 1/2 then 5/8.... that is increasing by 1/16 on each side of the hole !!!

Q: Description says 3 pack, but I only received 1. Anyone else have this problem?

The packs come as 3 drill bits, unless you order a larger bit. Then you get only one. It states as you click the size bit you want whether it's 3 or 1. I hope that helps.

4.7/5

Product ID: 433983778

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Description

Irwin Industrial Tool .25In. X 12In. Aircraft Extension High Speed Steel Fractional

Specifications

Material	Blend
Finish Type	Black Oxide
Shank Type	Straight
Cutting Angle String	135 Degrees
Brand	IRWIN
Item Dimensions LxWxH	14.4 x 6.4 x 0.3 inches
Tool Flute Type	Straight
Surface Recommendation	Metal,Polyvinyl Chloride,Pvc,Wood
Manufacturer	IRWIN
Part Number	62116
Item Weight	2.4 ounces
Product Dimensions	14.4 x 6.4 x 0.3 inches
Item model number	62116
Is Discontinued By Manufacturer	No
Size	1/4" x 12"
Color	Multi
Style	1pc
Finish	Black Oxide
Item Package Quantity	1
Measurement System	Metric
Included Components	DRILL 1/4 A12 12" 135' BLK OX POUCH
Batteries Included?	No
Batteries Required?	No
Warranty Description	Manufacturer

Have a Question? See What Others Asked

Is this bit for drilling through 1/2 inch hard steel ?

I'm looking at the 3/8x12" bit, will it drill through 7" thick wood?

Needing to drill a frame to mount a hitch. What hole sizes should I graduate to, before using the 5/8"?

Description says 3 pack, but I only received 1. Anyone else have this problem?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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