Description:

• UPGRADE PATENT SPIRAL FOUR FLUTE - Our 4-flute design prevents the metal filler from splashing everywhere, and removes the swarf easily, so as to achieve smoother drilling.
• 118° X TYPE OPENINGS DESIGN - Ensure a faster and smoother drilling; 1/4"(6.35mm) hex shank design eliminate slipping in drill chuck, prefect for drilling holes in plastic, aluminum, copper, wood, sheet metal, mold steel and other surfaces.
• DURABLE TITANIUM COATED & HSS 4341 - The step drill bit is made of upgraded 4341 high speed steel. Coated by titanium, improve the wear and corrosion resistance.
• MULTIFUNCTIONAL CONE DRILL BIT - Not only expanding holes, but also deburring, chamfering and cutting. Applied to impact drivers, drill press, and power drills/drivers.
• WHAT YOU GET - SS SHOVAN 3PCS step drill bits(contain 3 size: 4-12mm, 4-20mm and 4-32 mm) and a canvas bag. It is an indispensable tool for carrying out precision work with good control of the hole diameter. Perfect for DIY lover!

Prevent drill from burn:

1. Slow down the speed before using the drill, the larger the diameter of the hole, the slower the speed, speed ≤ 800r/min.
2. Suitable cutting fluid (water, oil, or other lubricants and coolants, depending on the material of drilling) to cool while working, it can effectively extend the service life of the drill bit, especially in the case of continuous drilling.
3. If each step exceeds 20 seconds, please check the method.
4. If there is slippage and no swarf, please check the speed.

Package Include:

• 15 Step Bit: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)
• 9 Step Bit: 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)
• 5 Step Bit: 4-12mm (4mm, 6mm, 8mm, 10mm, 12mm)