OXMUL Z138-204 Step Drill Bit M35 1/4 13/8

( Brand: Oxmul ), ( Part Type: Step Drill Bit ), ( Tool Flute Type: Straight ), ( Surface Recommendation: Polyvinyl Chloride, Metal, Glass ), ( Finish Type: Black Oxide ), ( Size: 1 Unibit 1/4 1-3/8 ), ( Manufacturer Part Number: Z138-204 ), ( Material: Cobalt Steel ), ( Unit Count: 1.0 ), ( Package Dimensions Lxwxh: 4.45x1.57x1.57 Inches ), ( Weight: 0.42 Pounds )

Review OXMUL M35 Step Drill Bit Metal 1/4 To 13/8 Cobalt Bits Heavy Duty Stainless

Introducing the Oxmul Z138-204 M35 Step Drill Bit, an essential tool for any DIY enthusiast or professional mechanic. This high-performance drill bit is designed to make easy work of drilling through metal, delivering faster drilling speeds and improved durability.

The Z138-204 M35 Step Drill Bit is part of Oxmul's impressive range of 1/4 inch drill bits, and it's specifically engineered to accommodate 13/8 inches shank sizes. The M35 designation indicates that this bit features a 35 degree helix angle, which optimizes chip evacuation, reducing drag and ensuring smooth drilling.

The drill bit's body is made of premium quality high-speed steel (HSS), which provides excellent strength and resistance to wear and tear. The cutting edges are hardened to a Rockwell C hardness of 61-63, ensuring sharpness and longevity. Furthermore, the bit's tip is treated with a special process called Molybdenum Prolonging, which enhances the bit's resistance to thermal shock and increases its overall life span.

One of the most notable features of the Oxmul Z138-204 M35 Step Drill Bit is its innovative step design. The stepped design allows for precise drilling depth control, enabling users to create holes of exact dimensions without the need for additional measuring tools. Each step measures 1/32 inch, providing accurate and reliable depth adjustments.

This drill bit also boasts a self-centering tip, which ensures that the bit aligns correctly with the workpiece, reducing the risk of drilling misalignments and improving overall drilling accuracy. Additionally, the bit's shank is designed to fit standard 1/4 inch drill chuck, making it compatible with a wide range of drilling machines and handheld drills.

The Oxmul Z138-204 M35 Step Drill Bit is an excellent choice for a variety of drilling applications, including automotive repair, metalworking, construction, and general DIY projects. Its superior quality, durability, and performance make it a must-have addition to any toolbox.

The Oxmul Z138-204 M35 step drill bit is a popular choice for those in need of a versatile and high-performance drill bit. Here are some pros and cons to help you make an informed decision about purchasing this bit:

1. Multi-purpose design: This drill bit comes with 13 different sizes, allowing users to drill holes in various materials such as metal, wood, and masonry.

2. M35 thread pitch: The M35 thread pitch of this drill bit ensures a secure and reliable connection to the drill chuck, reducing the risk of slippage during use.

3. Anti-vibration design: The step drill bit features an anti-vibration design that reduces the amount of vibration transmitted to the user, making it more comfortable to use for extended periods.

4. Durable construction: The drill bit is made of high-quality steel and has a hardened tip, ensuring long-lasting performance and resistance to wear and tear.

5. Economical: With 13 different sizes included in the set, this drill bit offers excellent value for money.

1. May require additional force: Some users have reported that this drill bit may require additional force to start drilling, especially in harder materials.

2. May not be suitable for very thick materials: This drill bit may not be suitable for drilling very thick materials, as the size range may not go deep enough.

3. May produce sparks: When drilling into metal, this drill bit may produce sparks, which could be a safety concern for some users.

In conclusion, the Oxmul Z138-204 M35 step drill bit is a versatile and high-performance drill bit that offers excellent value for money. Its multi-purpose design, durable construction, and anti-vibration features make it a popular choice among DIY enthusiasts and professionals alike. However, it may require additional force to start drilling in harder materials, and may not be suitable for very thick materials or for users who are sensitive to sparks.

If you are in need of a versatile and high-performance drill bit that offers excellent value for money, then the Oxmul Z138-204 M35 step drill bit is definitely worth considering. However, if you require a drill bit specifically for very thick materials or if you are sensitive to sparks, then you may want to consider other options. Ultimately, the decision to purchase this drill bit depends on your specific needs and preferences.

part # z138204 prices

• $42.09-$69.99

specifications drillnubbin:

• brand: Oxmul
• part type: Step Drill Bit
• tool flute type: Straight
• surface recommendation: Polyvinyl Chloride, Metal, Glass
• finish type: Black Oxide
• size: 1 Unibit 1/4 1-3/8
• manufacturer part number: Z138-204
• material: Cobalt Steel
• unit count: 1.0
• package dimensions lxwxh: 4.45x1.57x1.57 Inches
• weight: 0.42 Pounds

offer drillnubbin:

• availability: In Stock
• quantity: 1
• sold: 0
• options: Ship-to-home
• started: December 16, 2025

general drillnubbin:

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

seller drillnubbin:

• # reviews: 300
• rating: 100.0%

returns drillnubbin:

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

payments drillnubbin:

• other
• wallet: Apple-pay
• credit card: Discover

shipping drillnubbin:

• class: Standard
• transit: 10-10 Days
• type: Fixed
• cost: $0.00
• service: Standard

Oxmul Z138-204 Is Similar To:

• Oxmul Co138z Step Drill Bit For Metal 7/8 Inch To 1-3/8 Cobalt Bits Heavy Duty (80.7% similar) $37.15–$46.04. (May 28th, 2025)
• Oxmul Z118-210 Step Drill Bits For Metal 1-1/8 Inch 9-holes Cobalt Heavy (68.8% similar) $45.33. (November 21st, 2025)
• Oxmul Z18-205 M35 Step Drill Bits For Metal 1/8 To 1/2 Cobalt Bit Heavy Duty Stainless S (93.2% similar) $41.83–$69.99. (December 16th, 2025)