Klein Tools 4-Piece Step Drill Bit Set with Titanium Nitride Coating and Spiral Flutes
Professional drilling solution with 37 total hole sizes for versatile applications
The Klein Tools 4-Piece Step Drill Bit Set delivers professional performance with titanium nitride coating and dual spiral fluting for efficient drilling across multiple materials. This comprehensive kit includes four common step bit sizes (1/2", 3/4", 7/8", and 1-3/8") with high speed steel construction and 1/4" hex shank compatibility for impact drivers and standard drills. The rugged protective case features custom inserts and includes a 1-ounce oil bottle for optimal bit maintenance.
Professional Features & Benefits
- 37 Total Hole Sizes: Comprehensive range from 1/8" to 1-3/8" provides versatility for diverse drilling applications across materials up to 16 gauge steel, plastic, aluminum, and wood.
- Titanium Nitride Coating: Advanced TiN coating dissipates heat effectively, extending bit life and maintaining cutting performance under demanding conditions.
- Dual Spiral Fluting: Two spiral flutes on each bit efficiently remove chips and help pull the bit through material for faster, cleaner cutting action.
- High Speed Steel Construction: Durable material provides reliable performance and longevity for professional and heavy-duty applications.
- 1/4" Hex Shank: Universal hex shank design ensures firm, positive grip in both impact drivers and standard drill chucks.
- Split Point Tip Design: Precision tip quickly starts hole cuts and prevents drifting when pressure is applied, ensuring accurate hole placement.
- Complete Kit with Case: Rugged protective case with custom inserts keeps bits organized and includes 1-ounce oil bottle for proper lubrication and maintenance.
Technical Specifications
- Coating: Titanium Nitride
- Department: Electrical
- Depth: 8.7500 in
- Flute Type: Spiral
- Height: 4.8600 in
- Material: High Speed Steel
- Number Of Holes: 37 Total
- Overall Height: 4.9" (12.3 cm)
- Overall Length: 8.75" (22.2 cm)
- Overall Width: 2.75" (7 cm)
- Product Details: Step Drill Bit Set
- Product Group: Hand Tools
- Product Size: 1/8" to 1/2" (3.2 to 12.7 mm); 1/4" to 3/4" (6.4 to 19.1 mm); 3/16" to 7/8" (4.8 to 22.2 mm); 7/8" to 1-3/8" (22.2 to 34.9 mm)
- Product Subgroup: Screwdrivers & Drivers
- Product Type: Step Drill Bit Set
- Quick Reference: #1, #3, #14, #15
- Shank Type: 1/4" Hex
- Weight: 1.5000 lbs
- Width: 2.7500 in
Installation & Operation
- Select the appropriate step bit size for your desired hole diameter from the four included bits.
- Secure the bit in your impact driver or drill chuck using the 1/4" hex shank for positive grip.
- Apply cutting oil from the included bottle to the bit and material surface for optimal performance and bit life.
- Position the split point tip at the desired hole location and begin drilling at moderate speed with steady pressure.
- Allow the dual spiral flutes to remove chips naturally while the bit pulls through the material.
- Clean bits after use and store in the protective case with custom inserts to maintain organization and protection.
Professional Applications
- Electrical panel and enclosure modifications
- HVAC ductwork and sheet metal fabrication
- Plumbing and pipe fitting installations
- General construction and maintenance projects
- Automotive and mechanical repair work
- DIY home improvement and workshop applications
- Industrial maintenance and facility management
Why Choose Klein Tools Quality?
Klein Tools delivers professional-grade performance with high speed steel construction, advanced titanium nitride coating, and precision engineering. The comprehensive kit design with protective case and maintenance oil demonstrates Klein Tools' commitment to providing complete solutions that enhance productivity and tool longevity for professional tradespeople and serious DIY enthusiasts.
Manufacturer Resources
Spec Sheet
Product Specs
- Coating:
- Titanium Nitride
- Flute Type:
- Spiral
- Number Of Holes:
- 37 Total
- Overall Height:
- 4.9" (12.3 cm)
- Overall Length:
- 8.75" (22.2 cm)
- Overall Width:
- 2.75" (7 cm)
- Quick Reference:
- #1, #3, #14, #15
- Shank Type:
- 1/4" Hex
- Department:
- Electrical
- Product Group:
- Power Tools & Accessories
- Product Subgroup:
- Drill & Driver Bits
- Product Type:
- Drill Bit Set
- Product Details:
- Step Drill Bit Set
- Product Height:
- 4.8600 in
- Product Material:
- High Speed Steel
- Product Weight:
- 1.5000 lbs
- Product Width:
- 2.7500 in
- Product Depth:
- 8.7500 in
Klein Tools 25950 – Frequently Asked Questions
1) What hole sizes does the Klein Tools 25950 step bit kit cover?
Four bits cover 37 hole sizes in total, from 1/8 inch up to 1-3/8 inch. The ranges are 1/8 to 1/2 inch, 1/4 to 3/4 inch, 3/16 to 7/8 inch, and 7/8 to 1-3/8 inch. That spans the common knockout and connector sizes an electrician drills in a panel or enclosure, plus the larger 1-3/8 inch openings.
2) Will the Klein 25950 step bits run in an impact driver, or do I need a drill?
Both. Each bit has a 1/4 inch hex shank, so it locks into an impact driver's quick-change collet and also grips in a standard three-jaw drill chuck. No adapter needed either way.
3) How thick a material can these step bits drill?
The Klein 25950 step bits are rated for sheet material up to 16 gauge steel, and also cut plastic, aluminum and wood. Step bits cut on the step shoulder, so they are for sheet stock and thin wall, not thick plate. For an enclosure wall, a panel can or a duct, you are well inside the range.
4) Which individual Klein step bits are in the 25950 kit?
The kit holds Klein step bit numbers 1, 3, 14 and 15, which correspond to the 1/2 inch, 3/4 inch, 7/8 inch and 1-3/8 inch maximum sizes. Those reference numbers are what you order against if you wear one out and want to replace just that bit.
5) Why pick a double spiral flute step bit over a straight flute one?
Each bit in the 25950 kit has two spiral flutes. The spiral clears chips up out of the hole and helps draw the bit through the sheet, so it cuts faster and grabs less at breakthrough than a straight flute step bit. Straight flute bits are simpler and cheaper but tend to chatter and load with swarf in thin steel.
6) Is this the right step bit set for enlarging knockouts in an electrical panel?
Yes, that is the core use. Enclosure and panel sheet steel falls inside the 16 gauge capacity, and the 37 sizes up to 1-3/8 inch cover opening up existing knockouts for connectors and fittings. The same set handles HVAC sheet metal and general MRO sheet work.
7) Do I need to centre punch before drilling with these bits?
The bits use a split point tip that bites in and starts the hole without wandering when you lean on it, so a punch mark is helpful on slick or painted sheet but not required the way it is with a blunt-tip step bit. Start at moderate speed with steady pressure.
8) What does the Klein 25950 kit ship in, and how big is it in the truck?
It ships in a rugged case with custom inserts holding the four bits plus the oil bottle. The case measures 8.75 inches long by 4.9 inches high by 2.75 inches wide and the whole kit weighs 1.5 lbs, so it drops into a tool bag or van bin without taking a shelf.
How fast can I get the Klein Tools 25950 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools 25950 come with a warranty?
Absolutely. The Klein Tools 25950 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools 25950?
You can call, text, or email our expert support team for fast answers. We’re here to help with
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selection,
installation tips, and troubleshooting. Contact Us
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