Jerax tools M2 Step Drill Bit Unibit 1/4"–1-3/8" — 5 Sizes, High-Speed Steel, Nitride Surface

Jerax tools M2 step drill bit (1/4"–1-3/8") is a single-piece unibit that drills five precise hole sizes quickly and cleanly in metals and softer materials.

This heavy-duty M2 high-speed steel step bit replaces a small set of individual bits, letting you cut multiple hole diameters without switching tools. Engineered with increased tungsten and molybdenum, plus vacuum heat treatment and nitride surface hardening, the bit is designed for longer life and cleaner cuts than ordinary step bits. Polished steps and marked size highlights let you monitor progress while drilling, reducing stops and rechecks.

How does this step bit improve hole quality compared to standard bits?

The M2 composition and enhanced surface treatment deliver sharper edges and greater wear resistance, so holes come out cleaner with less burring. Precision CNC machining creates consistent step geometry, which reduces chatter and oversized openings. Overall you get smoother finishes and fewer follow-up operations like deburring.

• High-speed M2 steel with extra tungsten and molybdenum for edge retention
• Vacuum heat-treated core and nitride surface for extended life
• Polished steps to minimize friction and heat buildup
• Laser-marked sizes for accurate depth and diameter control

What materials and thicknesses can the Unibit handle?

This Jerax tools step bit is meant for a broad range of materials: ferrous and non-ferrous metals, plastics and wood. It will cut through aluminum, copper, mild steel, galvanized metal, and even stainless steel up to thin-gauge limits when paired with appropriate feed pressure and coolant. For best results in harder metals, maintain steady speed and use cutting fluid.

• Stainless steel up to about 12 gauge (≈2.7 mm) with correct technique
• Mild steel, galvanized steel, aluminum and copper with standard drilling speeds
• Plastics and wood for clean, controlled openings
• Not recommended for very hard tool steels or cast iron without specialist setup

How do I use the 1/4"–1-3/8" Unibit safely and accurately?

Mount the step bit in a keyed or hex-shank drill chuck with minimal runout, start at a moderate speed, and keep the bit perpendicular to the work surface. Use light, consistent pressure and pause to clear chips if cutting thicker metal. Apply cutting oil for metal to reduce heat and extend tool life, and clamp workpieces securely to prevent movement.

• Secure work and use steady, moderate drill speed
• Apply cutting fluid on metal and clear chips regularly
• Use depth stops or marked steps to land exact hole sizes
• Wear eye protection and gloves for safe operation

Which hole sizes does this single step bit replace?

This Unibit covers five commonly used diameters so you can skip swapping between multiple bits. Each step is laser-marked to make size selection quick and visible during drilling. That saves time on the job and reduces the number of tools you need to carry for general metalwork or fabrication tasks.

• Marked sizes: 7/8", 1-1/8", 1-7/32", 1-1/4", and 1-3/8"
• One-shank convenience eliminates frequent bit changes
• Suitable for on-site adjustments and prototype fabrication
• Laser marks help land the desired diameter without stopping

Who is this for? The Jerax tools 1/4"–1-3/8" M2 step drill bit is aimed at tradespeople, metal fabricators, HVAC installers, electricians, and DIYers who need a reliable multi-size cutter. It’s especially useful when you want fewer tool changes, cleaner holes, and longer bit life than economy step bits provide. If you frequently cut holes in sheet metal, thin stainless, or mixed materials and value precision with less effort, this Unibit is designed to streamline those tasks.