5pcs HSS Spiral Step Drill Bit Set Four Flute 1/8 to 1-3/8 Inch High Speed Steel Hex Shank for Stainless Steel Aluminum Wood Plastic Metal Hole Drilling Tools

Specifications:
Material: High-Speed Steel (HSS) with nitride coating
Cutting Diameter: Up to 1.38 inches
Shank Type: Straight (1/4" & 3/8" hex shank compatibility)
Tool Flute: Spiral, four-flute design
Step Sizes:
3/16"-1/2" (6 steps)
1/8"-1/2" (13 steps)
1/4"-3/4" (9 steps)
3/16"-7/8" (12 steps)
3/16"-1-3/8" (19 steps)


Features:
1.Premium High-Speed Steel Construction: Made from industrial-grade HSS with a nitride coating, these step drill bits resist wear and maintain sharp cutting edges for consistent performance on various materials, including stainless steel.
2.Four-Flute Spiral Design: The enhanced spiral design ensures superior cutting stability, faster chip clearance, and cleaner finishes—allowing precise hole drilling with reduced wobbling and heat accumulation.
3.Wide Diameter Range and Laser Markings: With step sizes ranging from 1/8" to 1-3/8", this set covers all your drilling needs and features permanent laser-etched size markings for easy reference during use.
4.Versatile Material Compatibility: Optimized for drilling in stainless steel, aluminum, copper, plastic, carbon steel, and wood, making it an essential tool for diverse applications such as home improvement, auto repair, and more.
5.Blow-Molded Storage Case: Convenient storage case keeps the drill bits organized, making transport effortless while ensuring quick access and protection during on-site tasks and daily use.


Package Included:
5 x Step Drill Bit
1 x Storage Case