Klein Tools Step Drill Bit 3/8-Inch Hex Shank Double Straight Flute 7/8-Inch to 1-3/8-Inch 3-Step High Speed Steel

Klein Tools Step Drill Bit 3/8-Inch Hex Shank Double Straight Flute

Professional-Grade 3-Step Drilling Solution for Multiple Materials

The Klein Tools Step Drill Bit delivers professional-grade drilling performance for electrical and construction applications. This high-speed steel drill bit features aluminum titanium nitride coating and double straight flute design for electricians, contractors, and maintenance professionals, providing the reliable performance and industry-leading quality that tradesmen demand from America's most trusted tool manufacturer.

Professional Features & Benefits

Advanced Coating Technology

• Aluminum Titanium Nitride Coating - 10 times more durable than black oxide coating for extended bit life and superior performance
• Double Straight Flute Design - Removes chips efficiently for clean cuts and smooth drilling operation
• Fast-Starting Non-Walking Tip - Prevents bit wandering and ensures precise hole placement on first contact
• Laser Markings - Easy-to-read size identification for quick selection and professional efficiency

Durability & Construction

• High-Speed Steel Construction - Premium material provides exceptional durability and cutting performance across multiple materials
• 3/8-Inch Hex Shank - Provides firm, positive grip that won't spin out in drill chuck for reliable operation
• Professional Grade Manufacturing - Klein Tools precision engineering ensures consistent performance and long service life

Technical Specifications

3-step drilling capacity from 7/8-inch to 1-3/8-inch (22.2 to 34.9 mm), 3/8-inch hex shank, high-speed steel construction with aluminum titanium nitride coating, double straight flute configuration, overall length 1.8 inches, weight 0.46 lbs, suitable for steel up to 16 gauge, wood, plastic, and aluminum materials.

Installation & Usage

1. Select appropriate drill with 3/8-inch hex chuck or use with hex chuck adapter for secure bit retention
2. Mark drilling location and ensure workpiece is properly secured and supported during operation
3. Start drilling at low speed to establish hole location, then increase to optimal drilling speed
4. Apply steady, consistent pressure while allowing the double flute design to clear chips effectively
5. Monitor drilling progress using laser-etched size markings for precise hole diameter control
6. Always wear approved eye protection and follow power tool manufacturer's safety guidelines

Professional Applications

Ideal for:

• Electrical Installation - Creating precise holes in electrical panels, junction boxes, and conduit systems
• HVAC Applications - Drilling ductwork, mounting brackets, and ventilation system components
• Construction Work - General construction drilling in steel framing, aluminum siding, and composite materials
• Maintenance Operations - Industrial and commercial maintenance requiring multiple hole sizes
• Telecommunications - Installing cable management systems and mounting hardware
• Automotive Repair - Body work and component modification requiring stepped hole drilling
• Sheet Metal Fabrication - Precise hole creation in thin gauge steel and aluminum materials
• Plumbing Applications - Creating access holes and mounting points for pipe supports and fixtures

Aluminum Titanium Nitride Advantage

Klein Tools advanced coating technology provides superior wear resistance and heat dissipation compared to standard coatings. The aluminum titanium nitride surface treatment reduces friction, prevents material buildup, and maintains sharp cutting edges longer, delivering consistent performance across thousands of drilling operations while reducing replacement costs.

Why Choose Klein Tools Quality?

Since 1857, Klein Tools has maintained America's highest standards for professional tool manufacturing. Every step drill bit undergoes rigorous quality testing to ensure precision cutting performance, durability under demanding job site conditions, and the safety standards that electrical and construction professionals require for reliable daily operation.