OXMUL CO138Z Step Drill Bit 7/8 1-3/8

( Brand: Oxmul ), ( Part Type: Step Drill Bit ), ( Included Components: One Step Drill Bit ), ( Tool Flute Type: Straight ), ( Finish Type: Black Oxide ), ( Size: Large ), ( Manufacturer Part Number: CO138Z ), ( Shank Type: 3-flat ), ( Material: M2 3 Cobalt Steel ), ( Unit Count: 1.0 ), ( Package Dimensions Lxwxh: 4.57x1.65x1.54 Inches ), ( Weight: 0.42 Pounds )

Review OXMUL Step Drill Bit Metal 7/8 Inch To 1-3/8 Cobalt Bits Heavy Duty

Introducing the Oxmul CO138Z Step Drill Bit, a versatile and high-performing addition to any DIYer or professional's toolkit. Designed to fit 7/8-inch shanks and compatible with 1-3/8-inch drill bits, this step drill bit is perfect for creating perfectly sized holes in various materials, including wood, metal, and masonry.

The Oxmul CO138Z is a 3-flute bit, which means it has three cutting edges that help in faster material removal and increased drilling efficiency. The bit's helix angle is optimally designed to minimize chip loading and reduce drill bit walking, ensuring a smooth and accurate drilling experience.

This step drill bit features a durable and heat-resistant tungsten carbide tip that can withstand the rigors of heavy-duty drilling tasks. The tip's sharp and precise edges enable the bit to drill through materials with ease, leaving a clean and burr-free hole.

The Oxmul CO138Z Step Drill Bit comes with a convenient drill bit storage case, which keeps your drill bits organized and protected when not in use. The case is compact and portable, making it easy to transport your drill bits to different job sites or workshops.

The bit's sturdy and robust design ensures a long service life, even in the most demanding conditions. Its corrosion-resistant coating also protects the bit from rust and other forms of wear and tear, ensuring that it maintains its performance and sharpness over an extended period.

In conclusion, the Oxmul CO138Z Step Drill Bit is an essential tool for any DIYer or professional who requires a high-performance and versatile drill bit for various drilling applications. Its durable and heat-resistant design, combined with its sharp tungsten carbide tip and optimally designed helical flutes, ensures a smooth and efficient drilling experience in various materials. With its convenient drill bit storage case, you can keep your drill bits organized and easily accessible, making your drilling tasks more efficient and productive.

Pros and Cons of buying a Oxmul CO138Z Step Drill Bit for 7/8 1-3/8 Sizes

The Oxmul CO138Z Step Drill Bit is a popular choice for those who need to drill multiple sizes of holes in a single operation. In this analysis, we will discuss the advantages and disadvantages of purchasing this step drill bit.

1. Versatility: The Oxmul CO138Z Step Drill Bit offers the convenience of drilling multiple sizes of holes with a single bit, saving time and effort.

2. Durability: This drill bit is made of high-quality, heat-treated steel, ensuring long-lasting performance.

3. Precision: The bit's self-centering design helps ensure accurate hole placement.

4. Compatibility: It can be used with various drill machines, making it a versatile addition to any toolbox.

1. Limited Sizes: Although it offers multiple sizes, the Oxmul CO138Z Step Drill Bit covers a limited range compared to other similar products in the market.

2. Price: This step drill bit may be more expensive than buying individual drill bits for each size.

3. Size Markings: Some users have reported that the size markings on the bit are not clear or easy to read.

The Oxmul CO138Z Step Drill Bit is a valuable investment for those who frequently need to drill multiple sizes of holes. Its durability, precision, and compatibility make it an excellent choice for professional use. However, its limited size range and potential price increase compared to individual drill bits should be considered before making a purchase.

If you frequently require drilling multiple sizes of holes, the Oxmul CO138Z Step Drill Bit is an excellent choice due to its durability, precision, and compatibility. However, if you only need to drill a few specific sizes, purchasing individual drill bits may be a more cost-effective option. Consider your drilling requirements and frequency before deciding which option is best for you.

part # co138z prices

• $37.15-$43.11

specifications drillnubbin:

• brand: Oxmul
• part type: Step Drill Bit
• included components: One Step Drill Bit
• tool flute type: Straight
• finish type: Black Oxide
• size: Large
• manufacturer part number: CO138Z
• shank type: 3-flat
• material: M2 3 Cobalt Steel
• unit count: 1.0
• package dimensions lxwxh: 4.57x1.65x1.54 Inches
• weight: 0.42 Pounds

offer drillnubbin:

• sold: 0
• options: Ship-to-home
• started: May 28, 2025
• availability: In Stock
• quantity: 1

seller drillnubbin:

• rating: 99.5%
• # reviews: 811

shipping drillnubbin:

• class: Standard
• transit: 3-7 Days
• service: Standard
• cost: $0.00
• type: Fixed

general drillnubbin:

• Tools Workshop Equipment > Power Tool Air Tool Accessories > Drill Bits
• condition: New

payments drillnubbin:

• wallet: Google-pay
• other
• credit card: Mastercard

returns drillnubbin:

• method: Money back
• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

Oxmul CO138Z Is Similar To:

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• Oxmul Z138-204 M35 Step Drill Bit For Metal 1/4 To 13/8 Cobalt Bits Heavy Duty Stainless (80.7% similar) $42.09–$69.99. (December 16th, 2025)
• Oxmul Z18-205 M35 Step Drill Bits For Metal 1/8 To 1/2 Cobalt Bit Heavy Duty Stainless S (77.1% similar) $42.09–$69.99. (December 16th, 2025)