Yanran Electric Wrench Multifunctional Step Tower Drill Bit Hole Opener 15-Step Spiral 4-32mm (HSS4241)

Spiral groove provides sharper cutting and smoother chip evacuation compared to straight groove

Available in multiple specifications and sizes for versatile applications

Step count varies by model (e.g., 9-step, 10-step, 15-step)

Suitable for use with drills of 24V or higher power for optimal performance

Recommended drill speeds vary by diameter (e.g., 2000 rpm for 1mm, 550 rpm for 20mm)

Larger diameter bits require slower speeds and higher torque

Suitable for handheld drills for metal cutting up to 2mm thickness; for 2-5mm thickness, use bench drills

Not suitable for drilling concrete, tiles, glass, or similar materials (specialized bits available separately)

Efficient chip evacuation reduces heat and prolongs tool life

Drilling and enlarging holes in metal sheets, aluminum, steel, stainless steel, and wood

Industrial and professional use requiring high precision and durability

Clear marking and detailed product information included

Multiple sizes and groove types available to meet diverse customer needs