SKU: 84409582364

Irwin Tools - 10312ZR Unibit #12 3/8-Inch Step-Drill Bit, 1/4-Inch Shank (10312) Black

Sale price$25.25 Regular price$28.06
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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Description

Irwin Tools - 10312ZR Unibit #12 3/8-Inch Step-Drill Bit, 1/4-Inch Shank (10312) BlackUNIBIT 12 3 8" Single Hole Size Features Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates Single flute cutting edge for greater control through steps Patented single flute cutting edge gives the user a true round hole every time 3 faltted shank prevents slipping in drill chuck New SpeedPoint tip penetrates faster than previous Unibits and prevents walking Specifications Manufacturer :

UNIBIT 12 3/8" - Single Hole Size

Features

  • Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates

  • Single-flute cutting edge for greater control through steps

  • Patented single-flute cutting edge gives the user a true round hole every time

  • 3 faltted shank prevents slipping in drill chuck

  • New SpeedPoint tip penetrates faster than previous Unibits and prevents walking

Specifications

Manufacturer : IRWIN

Part Number : 10312ZR

Item Weight : 2 pounds

Product Dimensions : 8 x 8 x 8 inches

Item model number : 10312ZR

Is Discontinued By Manufacturer : No

Size : #12 (3/8")

Color : Black

Style : High Speed Steel

Material : Stainless Steel

Item Package Quantity : 1

Measurement System : Inch

Batteries Included? : No

Batteries Required? : No

ASIN : B00075PU3A

Customer Reviews : 4.7 out of 5 stars 20 ratings 4.7 out of 5 stars

Best Sellers Rank : #172,226 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #234 in Step Drill Bits

Domestic Shipping : Item can be shipped within U.S.

International Shipping : This item can be shipped to select countries outside of the U.S. Learn More

Date First Available : January 23, 2006

Brand : Irwin Tools

Item Dimensions LxWxH : 8 x 8 x 8 inches

Shank Type : Round

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 84409582364

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4.1 ★★★★★
Based on 28 reviews
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Product Reviews
S
Verified Purchase
Sigrid Inger
Omaha, US
★★★★★ 5
Much much better than the standard sock
Size: X-Large, Color: (001) Black / Black / Castlerock
These socks are superb. Lots of padding in the right places, snug where it should be snug & loose where you don't want it to bind. They are marked with an 'L' for left foot, & 'R' for the right foot (it makes a difference in the fit being perfect. They stay up on your heel & don't slide down
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
C
Verified Purchase
Chris
San Leandro, US
★★★★★ 4
4 lefts vs 2 rights
Size: Medium, Color: (001) Black / Black / Castlerock, Size: Medium, Color: (001) Black / Black / Castlerock
I ordered a set of three. I ended up with four left socks and two right socks lol. Granted it doesn’t matter unless you’re OCD. JEEZ. Love the socks but not the attention to detail the sock company did on matching left/right marked socks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
J
Verified Purchase
Jill
Pawtucket, US
★★★★★ 5
My favorite socks
Size: Medium, Color: (001) Black / Black / Castlerock
I love love, love the left and right socks one has an L one has an R and they fit so well and they’re so comfy for running jogging or walking. They are my favorite socks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2026
V
Verified Purchase
vbgirlfla
New York, US
★★★★★ 5
Hold up to tough wear - definitely recommend
Size: X-Large, Color: (001) Black / Black / Castlerock
These are my teens favorite socks. We've ordered multiple sets. Given that he tends to wear then as slippers I am really impressed with how they hold up. The extra large size is great for bigger feet. They wash well and I didn't notice any shrinkage, fading or pilling. This set is going to college with him.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
J
Verified Purchase
Jana
Dallas, US
★★★★★ 5
Good quality
Size: Large, Color: (400) Royal / White / Mod Gray
To big! I am female size 9 and Amazon was recommending for me size L. Yes, my socks is wearing my boyfriend. I need to buy smaller size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 13, 2025

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