Klein Tools 2-Step Drill Bit 7/8-Inch to 1-1/8-Inch with 3/8-Inch Hex Shank and AlTiN Coating

Klein Tools 2-Step Drill Bit 7/8-Inch to 1-1/8-Inch with 3/8-Inch Hex Shank and AlTiN Coating

Professional drilling performance with aluminum titanium nitride coating for extended durability

Klein Tools delivers professional-grade drilling performance with this 2-step drill bit featuring 7/8-inch to 1-1/8-inch sizing and durable 3/8-inch hex shank construction. Built from high speed steel with aluminum titanium nitride coating, this step drill bit provides reliable performance for steel up to 16 gauge, wood, plastic, and aluminum applications with double straight flute design for clean chip removal.

Professional Features & Benefits

• 7/8-Inch to 1-1/8-Inch Step Sizing: Provides two precise hole sizes in one bit for versatile drilling applications and reduced tool changes.
• Aluminum Titanium Nitride Coating: Delivers 10 times more durability than steamed black oxide coating for extended bit life and consistent performance.
• 3/8-Inch Hex Shank: Ensures firm, positive grip in drill chucks and prevents spinning out during operation for reliable power transfer.
• Double Straight Flute Design: Removes chips efficiently for clean cuts and smooth drilling action across multiple materials.
• High Speed Steel Construction: Provides the strength and heat resistance needed for demanding drilling applications in various materials.
• Fast-Starting Non-Walking Tip: Eliminates bit wandering for precise hole placement and professional results from the first contact.
• Laser Markings: Enable quick size identification for efficient workflow and proper bit selection in professional environments.

Technical Specifications

• Coating: Aluminum Titanium Nitride (AlTiN)
• Department: Electrical
• Depth: 3.2200 in
• Flute Type: Straight
• Height: 1.2000 in
• Increment: Varies
• Material: High Speed Steel
• Number Of Holes: 2
• Overall Height: 3.22" (8.2 cm)
• Overall Length: 1.13" (2.9 cm)
• Overall Width: 1.13" (2.9 cm)
• Product Details: Step Drill Bit
• Product Group: Hand Tools
• Product Size: 7/8" to 1-1/8" (22.2 to 28.6 mm)
• Product Subgroup: Screwdrivers & Drivers
• Product Type: Step Drill Bit
• Quick Reference: #11
• Shank Type: 3/8" Hex
• Weight: 0.3000 lbs
• Width: 1.2000 in

Installation & Operation

1. Mount the bit securely in a compatible drill with 3/8-inch hex chuck or appropriate chuck adapter.
2. Mark the desired hole location and ensure workpiece is properly secured and supported.
3. Start drilling at low speed to establish the hole, then increase to appropriate speed for the material being drilled.
4. Apply steady, consistent pressure while allowing the double straight flutes to clear chips effectively.
5. Monitor drilling progress and step sizing to achieve the desired hole diameter for your application.
6. Complete final inspection and follow proper bit maintenance practices for extended service life.

Professional Applications

• Electrical panel and enclosure installations requiring precise knockout holes
• 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 to deliver professional-grade performance and extended service life. The precision-engineered double straight flute design and non-walking tip ensure clean, accurate holes across multiple materials, while the durable 3/8-inch hex shank provides reliable power transfer and secure chuck engagement for demanding professional applications.