Lichamp Jumbo 2-3/8ft Unibit Step Drill Bit - Heavy Duty Metal

Our review of the Lichamp Jumbo 2-3/8' Unibit shows it is aimed at people who need a single, versatile drill stepper for a range of large hole sizes in metalwork and heavy DIY. The bottom line: buy this if you want one durable bit that covers a broad spread of sizes without swapping bits, because its 12-step design and heavy duty high speed steel construction make multi-size hole cutting much faster on thin to medium gauge metals. This review focuses on real use, durability, and where it fits into a workshop toolset.

Key Features

• 12 Sizes in One: The bit drills twelve diameters from 1/4' up to 2-3/8' so a single tool replaces many individual drills and saves time when opening different sized holes.
• Durable High Speed Steel: Made from HSS with a black coating that reduces friction and helps resist heat, corrosion and rust to extend cutting-edge life.
• Large 13 mm Shank: The 1/2' shank gives stable grip in standard chucks and handles higher torque from electric or rechargeable drills without excessive wobble.
• Split Tip and Double Helix: A 118 degree split tip improves wear resistance and the double helix flutes evacuate chips more smoothly for cleaner cuts.
• Designed for Metal Work: Extra large stepped design and spiral grooves make it suitable for metal, workshop tasks and many DIY projects where larger holes are required.

Who It's For

The Lichamp jumbo step drill is best for mechanics, fabricators and DIYers who frequently cut larger holes in sheet metal, enclosure panels or light structural metal and who value speed of changing sizes. Its wide range of diameters is particularly useful for electrical box knockouts, ducting or plumbing pass-throughs where precise, repeatable hole sizes are needed.

It is less suited to users who expect to bore deep holes in very thick, hardened steel or who need razor-sharp carbide cutting edges for production-grade heavy metal work; some customers report mixed sharpness and occasional breakage when pushed beyond intended metal thickness. For heavy industrial drilling, a purpose-specific carbide or annular cutter would be more appropriate.

Pros & Cons

Pros

• Replaces multiple bits with one tool, reducing bit changes and setup time.
• Black-coated HSS construction reduces friction, heat and corrosion for longer life.
• Split tip and double helix flute give smoother cuts and easier chip removal.
• Robust 1/2' shank improves stability in standard drill chucks.

Cons

• Some users report variable sharpness out of the box and occasional breakage when used on very hard or thick metal.
• Not a substitute for carbide or specialized heavy industrial cutters for the toughest metalwork.

Specifications

Our Verdict

The Lichamp Jumbo 2-3/8' Unibit is a practical, value-minded tool for workshop and DIY metal drilling where multiple hole sizes are required quickly. Its HSS construction and large shank give good stability and durability for thin to medium metal tasks, though users should temper expectations for extreme heavy-duty or hardened steel work. For most home and light shop projects this step drill offers clear time savings and reasonable longevity.

Frequently Asked Questions

Can this bit be used in cordless drills?
Yes, it is compatible with electric and rechargeable drills, but use a stable chuck and moderate speed to avoid overheating.

What lubrication is recommended?
Using cutting fluid for metal drilling is recommended to reduce heat, extend tool life and improve cut quality; cutting fluid is not included.

What sizes does it cut?
It cuts twelve sizes from 1/4' up to 2-3/8' as listed on the product and saves swapping between multiple drill bits.