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

Specifications Material High Speed Steel HSS with nitride coatingCutting Diameter Up to 1 38 inchesShank Type Straight 1 4 3 8 hex shank compatibility Tool Flute Spiral four flute designStep 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 Bit1 x Storage Case