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Item #:
131589573
HSS 78-1-38 High Speed Steel Step Drill bits, Doubles Flutes Large Unibit for Hole Drilling in Iron, Copper, Aluminum, Wood, Plastic
82% of respondents would recommend this to a friend
Item #:
131589573
MVR 548
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Order now and get it around Wednesday, September 09
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What Stands Out
Versatile Materials
Effortlessly drills through iron, copper, aluminum, wood, and plastic, making it suitable for a wide range of projects, from DIY tasks to professional applications.
Doubles Flutes Design
The innovative doubles flutes enhance cutting efficiency, providing smoother and faster drilling while minimizing material shavings for a cleaner work environment.
High Speed Steel
Crafted from durable high-speed steel, these bits offer exceptional longevity and resistance to wear, ensuring reliable performance even under demanding usage.
Product Details
| Material | High Speed Steel (HSS) |
| Cutting Diameter | 1.38 Inches (3.5 cm) |
| Shank Type | Triangle |
| Cutting Angle String | 118 Degrees |
| Brand | Jerax tools |
Who Should Buy?
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DIY Enthusiasts
Perfect for hobbyists undertaking home projects, allowing clean and efficient hole drilling in various materials.
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Professional Mechanics
Ideal for automotive and repair professionals who need reliable bits for drilling through metal components.
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Woodworkers
Great for craftsmen focusing on precise holes in wood, ensuring a smooth finish and varied sizing options.
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High Production Environments
Not suitable for industries needing high-speed drilling; may wear down quickly under continuous use.
Product Description
HSS 78-1-38 High Speed Steel Step Drill bits, Doubles Flutes Large Unibit for Hole Drilling in Iron, Copper, Aluminum, Wood, Plastic
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What are HSS step drill bits used for?
Answer: HSS step drill bits are designed for drilling holes in various materials such as iron, copper, aluminum, wood, and plastic. Their unique stepped design allows you to create multiple hole sizes with just one bit, making them incredibly versatile. For example, if you need to drill different-sized holes for plumbing or electrical work, a step drill bit can efficiently handle the task without requiring a full set of drill bits. -
Question:
How do double flutes benefit drilling?
Answer: Double flutes on these step drill bits improve the drilling process by enhancing chip removal and reducing friction. This design allows for faster and cleaner drilling, especially in harder materials. For instance, when working with thicker aluminum or iron, the double flutes ensure that the bits do not overheat, which contributes to a more precise hole without compromising the material. -
Question:
Can step drill bits be used on all types of materials?
Answer: Step drill bits are versatile enough to drill through a variety of materials, including metals like iron and copper, as well as softer materials such as wood and plastic. Their ability to handle different materials makes them ideal for DIY projects, plumbing, and electrical tasks. Always make sure to use the right speed and pressure to optimize performance according to the material. -
Question:
What sizes are available in this HSS step drill bit set?
Answer: This HSS step drill bit set covers sizes ranging from 1/8 to 1/2 inch. This range allows you to drill holes appropriate for numerous applications, whether for small electrical connections or larger fixtures. Each step is designed to deliver specific hole sizes, accommodating a wide range of projects without needing multiple drill bits. -
Question:
Are these step drill bits suitable for professional use?
Answer: Yes, these HSS step drill bits are suitable for both professional and DIY users. They are designed with durability and precision in mind, making them ideal for contractors who require reliable tools for routine work on materials like metal and wood. Their performance allows professionals to achieve consistent results, even under demanding conditions. -
Question:
What should I consider when using step drill bits in metal?
Answer: When using step drill bits to drill through metal, it's important to apply steady pressure and maintain a compatible drill speed. Slower speeds will often yield better results in metals to prevent overheating and workpiece distortion. Additionally, using cutting oil can help lubricate the bit and enhance its longevity while ensuring smoother drilling. -
Question:
Can I use these bits in a standard drill?
Answer: Yes, these HSS step drill bits can be used with a standard drill, including corded and cordless versions. Ensure that your drill has a chuck capable of securely holding the bit and allows you to adjust the speed settings, as different materials and applications may require different RPM for optimal results. -
Question:
Are there any special care instructions for maintaining HSS step drill bits?
Answer: To maintain the performance of your HSS step drill bits, keep them clean and protect them from moisture to prevent rust. After use, wipe them down and store them in a protective case to avoid any accidental damage. Regularly inspect for wear and replace them when necessary to ensure optimal performance on your projects. -
Question:
Can these bits be resharpened?
Answer: Yes, HSS step drill bits can be resharpened, restoring their cutting ability and extending their lifespan. It's recommended to have them sharpened by a professional to ensure proper angles and dimensions are maintained. This will help retain their performance across multiple uses, especially in demanding drilling tasks. -
Question:
Where can I buy HSS 1/8-1/2 Inch High Speed Steel Step Drill bits?
Answer: You can buy HSS 1/8-1/2 Inch High Speed Steel Step Drill bits at Ubuy. They offer a wide selection of high-quality tools and drilling accessories suitable for various applications. By shopping at Ubuy, you can conveniently find these step drill bits tailored to your specific needs.
Jeraxtools Drill Bits Editorial Review
The HSS 1/8-1/2 Inch High Speed Steel Step Drill Bit has garnered a mix of feedback from users, highlighting its effectiveness in certain scenarios while drawing critiques in others. Customers have generally found the drill bits suitable for a variety of materials including iron, copper, aluminum, wood, and plastic. Many reviews praised the drill bits for their ability to create clean and precise holes; for instance, users reported that they successfully drilled large holes in robust materials such as shipping containers and fiberglass. While the drill bit's performance has impressed some users with features such as multiple flutes that prevent grabbing and improve ease of use, others have noted concerns regarding sharpness. A few individuals indicated that the bit might not have the necessary cutting edge or "bite" to work effectively on tougher materials, which resulted in slower drilling speeds or required additional techniques like rocking the bit to achieve desired results. Despite this, users still achieved their goals of enlarging holes or making new ones—a testament to its versatility, though not without some limitations. Overall, the product is well received for lighter tasks and is seen as a versatile tool for DIY enthusiasts and professionals alike. However, potential buyers should Consider the mixed feedback concerning sharpness and be prepared to adapt their drilling techniques according to the material being worked on. **
Customer Reviews & Ratings
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Pros
- Effective for drilling various materials including plastic, wood, and softer metals.
- Produces clean holes with precision when used correctly.
- Multiple flutes help avoid grabbing during drilling.
Cons
- Some users reported the drill bit to be not very sharp, leading to slower drilling on tougher materials.
Platform Trust & Buyer Confidence
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Mohammad
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“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
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“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
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MVR 548
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Features & Benefits
- Made of premium High Speed Steel for exceptional durability.
- Drills through various materials: Iron, Aluminum, Copper, Plastic, Wood.
- No pilot hole required for easy and quick drilling.
- Features 13 marked sizes for diverse hole sizes in one bit.
- Polished steps allow visibility of target hole size during use.
- Save time and effort with a single bit instead of multiple changes.
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