Klein Tools Bi-Metal Hole Saw Kit 8-Piece Professional Electrical Contractor Set
Professional-Grade Hole Cutting System for Electrical Installation
The Klein Tools Bi-Metal Hole Saw Kit delivers professional-grade hole cutting performance for electrical installation and construction applications. This 8-piece bi-metal hole saw system features optimized teeth pattern technology designed for electricians, contractors, and construction professionals, providing the reliable cutting performance and industry-leading quality that tradesmen demand from America's most trusted tool manufacturer.
Professional Features & Benefits
Advanced Cutting Performance
- Bi-Metal Construction - Superior durability and cutting life with Klein's precision-engineered tooth design for consistent performance
- Optimized Teeth Pattern - Fast, consistent cutting through mild steel, stainless steel, and various construction materials with professional efficiency
- Single Pass Capability - Bore through 2x4 lumber in one pass, reducing installation time and increasing productivity on job sites
- Versatile Material Compatibility - Cuts precise holes in steel, stainless steel, drywall, ceiling tile, laminates, wood, and plastic with Klein quality results
Professional Convenience & Safety
- Complete Size Range - Kit contains most popular electrical sizes: 7/8-inch, 1-1/8-inch, 1-3/8-inch, 1-3/4-inch, 2-inch, and 2-1/2-inch for comprehensive coverage
- Easy Slug Removal - Multiple leverage points designed for quick, safe material removal without damage to cutting edge
- Professional Organization - Includes two arbors and rugged carrying case for secure transport and organized storage on job sites
Technical Specifications
8-piece bi-metal hole saw kit with sizes 7/8-inch, 1-1/8-inch, 1-3/8-inch, 1-3/4-inch, 2-inch, and 2-1/2-inch diameter capacity. Kit dimensions: 7.0 inches height x 3.0 inches width x 7.0 inches depth, total weight 2.6 pounds. Includes two professional arbors and rugged carrying case. Optimized for hole making in wood, plastic, mild steel, and stainless steel applications with professional-grade bi-metal construction.
Installation & Usage
- Select appropriate hole saw size for electrical box, conduit, or fixture installation requirements
- Install hole saw on arbor with pilot drill point set 1/8-inch beyond tooth points for proper cutting alignment
- Mark cutting location and ensure work surface is properly secured before beginning operation
- Begin cutting at low speed, allowing bi-metal teeth to establish cutting groove before increasing speed
- Maintain steady pressure and allow Klein's optimized tooth pattern to cut efficiently through material
- Use multiple leverage points for safe slug removal after completing cut, preserving cutting edge integrity
Professional Applications
Ideal for:
- Electrical Installation - Outlet boxes, switch boxes, junction boxes, and electrical panel installations in various wall materials
- Construction Work - Framing, drywall installation, ceiling work, and structural modifications requiring precise hole cutting
- HVAC Applications - Ductwork penetrations, ventilation installations, and mechanical system access holes
- Telecommunications - Cable routing, equipment mounting, and communication system installations
- Industrial Maintenance - Equipment modifications, repair access holes, and facility maintenance projects
- Residential Wiring - Home electrical upgrades, fixture installations, and residential construction projects
- Commercial Electrical - Office buildings, retail spaces, and commercial facility electrical installations
- Contractor Applications - Multi-trade projects requiring versatile hole cutting capability across various materials
Bi-Metal Technology Advantage
Klein Tools bi-metal hole saw construction combines high-speed steel cutting edges with flexible alloy steel bodies, delivering superior cutting performance and extended tool life. The optimized teeth pattern ensures fast, consistent cutting through both ferrous and non-ferrous materials while maintaining precision and reducing cutting time on professional installations.
Why Choose Klein Tools Quality?
Since 1857, Klein Tools has maintained America's commitment to professional-grade tool manufacturing, with rigorous testing protocols and safety standards that electrical contractors and construction professionals trust. Each hole saw kit reflects Klein's dedication to precision engineering, durability testing, and the reliable performance that has made Klein Tools the preferred choice for electrical professionals nationwide.
KLN-31902 - spec sheet
Manufacturer Resources
Spec Sheet
Product Specs
- Application:
- Hole Making in Wood, Plastic, Mild and Stainless Steel
- Product Type:
- Hole Saw Kit
- Department:
- Electrical
- Product Group:
- Power Tools & Accessories
- Product Subgroup:
- Hole Saws & Bits
- Product Details:
- Bi Metal
- Product Height:
- 7.0000 in
- Product Weight:
- 2.6000 lbs
- Product Width:
- 3.0000 in
- Product Depth:
- 7.0000 in
Klein Tools 31902 – Frequently Asked Questions
1) What hole saw sizes come in the Klein 31902 8-piece kit?
The Klein 31902 bi-metal kit carries six saws: 7/8, 1-1/8, 1-3/8, 1-3/4, 2 and 2-1/2 inch. The remaining two pieces of the eight are arbors. Those sizes cover the common electrical runs, so if you need something larger than 2-1/2 inches for a big conduit penetration, you'll be buying that saw separately.
2) Will these hole saws cut steel, or are they only good for wood and drywall?
Bi-metal construction means they cut both. Klein rates the 31902 kit for hole making in wood, plastic, mild steel and stainless steel, and the description also covers drywall, ceiling tile and laminates. The high-speed steel cutting edges on an alloy steel body are what let the same saw go through a stud and then a steel strut or panel.
3) Can these hole saws bore through a 2x4 stud in one pass?
Yes. The 31902 saws have enough cutting depth to bore a 2x4 in a single pass, which is what you want when you're drilling a wall of studs for a cable run rather than cutting from both faces.
4) Do I need to buy an arbor separately for the Klein 31902 kit?
No. Two arbors ship in the case with the saws, which is why it's an 8-piece kit with six cutters. Set the pilot drill so the point sits 1/8 inch beyond the tooth points before you start the cut.
5) Which saw in this kit do I use for 1/2 inch and 3/4 inch EMT?
Pick by the outside diameter of the connector or coupling, not the trade size of the pipe. The 31902 range of 7/8, 1-1/8, 1-3/8, 1-3/4, 2 and 2-1/2 inch is built around the common electrical box, conduit and fixture openings, so measure the fitting you're passing through and take the next size up in the set.
6) Is the Klein 31902 the right kit for an HVAC or low-voltage crew, or is it electrical only?
It's built around electrical sizes but the material range carries across trades. Duct penetrations, ventilation access holes, cable routing for telecom, and general facility maintenance all fall inside what the kit cuts, since it handles wood, plastic, mild steel and stainless. The limit is diameter, not trade: the largest saw is 2-1/2 inches.
7) How big is the Klein 31902 hole saw case and how much does it weigh in a tool bag?
The case runs 7 inches by 3 inches by 7 inches and the whole kit weighs 2.6 pounds, so it drops into a pouch or gang box without eating much room. Everything stays in the rugged case for transport rather than loose in the bag.
8) How do you get the slug out of a Klein bi-metal hole saw without wrecking the teeth?
These saws have multiple leverage points cut into the body, so you pry the plug out through the slots instead of levering against the cutting edge. That keeps the teeth intact, which matters most on the smaller 7/8 and 1-1/8 inch saws where the plug packs in tight.
9) What is the right way to start a cut in steel with these hole saws?
Start slow. Run the drill at low speed until the bi-metal teeth establish a groove, then bring the speed up and hold steady pressure. Secure the workpiece first. Rushing the entry is what burns teeth on stainless, which this kit is otherwise rated to cut.
10) What is the Klein part number for the 8-piece bi-metal hole saw kit?
Klein Tools 31902. That single model number covers the full 8-piece kit, saws, arbors and case together, so there is nothing else to specify when you order.
How fast can I get the Klein Tools 31902 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 31902 come with a warranty?
Absolutely. The Klein Tools 31902 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 31902?
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