Klein Tools Step Drill Bit with Quick Release Hex Shank, 7/8" to 1-3/8", AlTiN Coated Double Spiral Flute

Klein Tools Step Drill Bit with Quick Release Hex Shank, 7/8" to 1-3/8", AlTiN Coated Double Spiral Flute

Professional drilling performance with advanced coating technology

Klein Tools delivers professional-grade step drill bit performance with this quick-release design featuring a 1/4" hex shank and aluminum titanium nitride coating. This high-speed steel step drill bit handles 7/8" to 1-3/8" hole sizes with double spiral flute design for efficient chip removal. The impact-rated shaft works with both impact drivers and standard drills, while the AlTiN coating provides 10 times more durability than steamed black oxide coating for extended bit life.

Professional Features & Benefits

• Quick-Release 1/4" Hex Shank: Provides firm, positive grip that won't spin out in the drill for reliable operation and easy bit changes.
• Aluminum Titanium Nitride Coating: Delivers 10 times more durability than steamed black oxide coating for longer bit life and consistent performance.
• Double Spiral Flute Design: Removes chips efficiently for faster cuts and drilling with reduced heat buildup.
• Impact-Rated Shaft: Compatible with both impact drivers and standard drills for versatile application options.
• Three Hole Size Capability: Drills 7/8" to 1-3/8" holes with laser markings for quick size identification.
• Fast-Starting Non-Walking Tip: Ensures precise hole placement and reduces bit wandering for accurate drilling results.
• High-Speed Steel Construction: Provides durability for use on steel up to 16 gauge, wood, plastic, and aluminum materials.

Technical Specifications

• Coating: Aluminum Titanium Nitride (AlTiN)
• Department: Electrical
• Depth: 1.3800 in
• Flute Type: Spiral
• Height: 3.5700 in
• Material: High Speed Steel
• Number Of Holes: 3
• Overall Height: 3.6" (9.4 cm)
• Overall Length: 1.8" (4.6 cm)
• Overall Width: 1.8" (4.6 cm)
• Product Details: Step Drill Bit
• Product Group: Hand Tools
• Product Size: 7/8" to 1-3/8" (22.2 mm to 34.9 mm)
• Product Subgroup: Screwdrivers & Drivers
• Product Type: Step Drill Bit
• Quick Reference: #15
• Shank Type: 1/4" Hex
• Weight: 0.4300 lbs
• Width: 1.3800 in

Installation & Operation

1. Mount the bit securely in a compatible drill or impact driver with 1/4" hex chuck capability.
2. Mark the desired hole location and ensure proper workpiece support and clamping.
3. Start drilling at low speed to establish the hole, then increase speed as needed for material type.
4. Apply steady, moderate pressure while allowing the double spiral flutes to clear chips effectively.
5. Use the laser markings to monitor hole size progress and stop at the desired diameter.
6. Complete the hole with smooth, consistent feed rate and allow bit to cool between multiple holes.

Professional Applications

• Electrical panel and enclosure installations requiring precise hole sizing
• HVAC ductwork and sheet metal fabrication projects
• Automotive and mechanical repair applications
• General construction and maintenance drilling tasks
• Plastic and aluminum component modifications
• Wood working projects requiring stepped hole profiles

Why Choose Klein Tools Quality?

Klein Tools step drill bits combine high-speed steel construction with advanced aluminum titanium nitride coating technology for professional-grade performance. The impact-rated design and quick-release hex shank provide versatility across drilling applications, while the double spiral flute design ensures efficient operation and extended tool life for demanding professional use.