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Klein Tools Manuals & User Guides

Klein Tools is a premier American manufacturer of professional-grade hand tools, test equipment, and personal protective gear for electricians and tradespeople.

Tip: include the full model number printed on your Klein Tools label for the best match.

About Klein Tools manuals on Manuals.plus

Klein Tools is a family-owned and operated American company that has been designing, developing, and manufacturing premium-quality, professional-grade hand tools since 1857. As the number one choice for professional electricians and tradespeople in the United States, Klein Tools is renowned for durability, precision, and performance.

The company produces a vast array of products including pliers, wire strippers, screwdrivers, nut drivers, voice-data-video testers, digital multimeters, clamp meters, and thermal imaging devices. Headquartered in Lincolnshire, Illinois, Klein Tools continues to manufacture the majority of its products in plants throughout the United States. Their tools are built to withstand the rigors of job sites, ensuring reliability for professionals who depend on them every day.

Klein Tools manuals

Latest manuals from manuals+ curated for this brand.

KLEIN TOOLS RT110 Outlet Tester Instructions

August 24, 2026
KLEIN TOOLS RT110 Outlet Tester Overview The RT110 receptacle tester detects common wiring problems in standard receptacles, including open ground, reverse polarity, open hot, open neutral, and hot/ground reversed. Specifications…

Klein Tools RT250 GFCI Receptacle Tester with LCD

product overview
The Klein Tools RT250 is a professional-grade GFCI receptacle tester with an LCD display, designed for North American 120V outlets. Features include voltage measurement, wiring fault detection, and GFCI trip…

TI290 Rechargeable Pro Thermal Imager

Instruction Manual
TI290, 2AI28-TI290A, 2AI28TI290A, TI290-1390506ART, EP 5033062, TI290 Rechargeable Pro Thermal Imager, TI290, Rechargeable Pro Thermal Imager, Thermal Imager, Imager

ET140

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ET140, KLEIN TOOLS,Klein Tools,Klein,Tools,ET140,Pinless,Moisture,Meter,for,Non-Destructive,Moisture,Detection,in,Drywall,Wood,and,Masonry;,Detects,up,to,3/4-Inch,Below,Surface,B0F7XHRLN6,B07SZX8QXH,B09KSXJN7D

CL320KIT

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CL320KIT, KLEIN TOOLS,Klein Tools,Klein,Tools,CL320KIT,HVAC,Kit,for,HVAC,Testing;,Digital,Clamp,Meter,Non-Contact,Voltage,Tester,and,Infrared/Probe,Thermometer,3-Tool,Test,Kit,B0F5JJ36GZ,B08ZJSN5X3,B08DDTV5KG

6941

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6941, Klein,Theo Klein,Klein,Theo,Miele,Washing,Machine,Premium,Toys,for,Kids,Ages,3,Years,&,Up,White,B00UCK33HU,

‎NCVT2P

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‎NCVT2P, ‎KLEIN TOOLS,‎Klein Tools,Klein,Tools,NCVT2P,Dual,Range,Non-Contact,Voltage,Tester,12-1000V,AC,Visual,and,Audible,Indicators,Auto,Power,Off,B07L5N8ZWS,

‎56403

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‎56403, KLEIN TOOLS,‎Klein Tools,Klein,Tools,56403,LED,Light,Rechargeable,Flashlight,/,Worklight,with,Kickstand,Magnetic,Mount,and,Carabiner,Charges,Small,Electronics,for,Work,Camping,B0CRYJ93F1,B07V4FTX6C

NCVT1P

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NCVT1P, KLEIN TOOLS,Klein Tools,Klein,Tools,NCVT1P,Voltage,Tester,Non-Contact,Low,Voltage,Tester,Pen,50V,to,1000V,AC,Audible,and,Flashing,LED,Alarms,Pocket,Clip,NCVT,Pen,Tester,B0C8Y98QPT,B0BS5SCNJ1,B0D59KMTFM,B0D6QXKYN9,B0CZKYTSVH,B099SJ6469

ET600

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ET600, KLEIN TOOLS,Klein Tools,Klein,Tools,ET600,Multimeter,Megohmmeter,Insulation,Tester,4000,Ohms,Resistance,125V/250V/500V/1000V,Auto-Ranging,TRMS,Multimeter,B0D4DKFPHV,B07ZZX5TK8

MM400

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MM400, KLEIN TOOLS,Klein Tools,Klein,Tools,MM400,Multimeter,Digital,Auto,Ranging,AC/DC,Voltage,Current,Capacitance,Frequency,Duty-Cycle,Diode,Continuity,Temp,600V,B0D54MMY9V,B0B57PFFYX,B018EXZO8M,B0B6WW5ZX8

‎HVNCVT1

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‎HVNCVT1, ‎KLEIN TOOLS,‎Klein Tools,Klein,Tools,HVNCVT-1,Dual-Range,Non-Contact,High-Voltage,Tester,Dual-Range,Audio/Visual,Indicators,Water,Resistant,With,Case,and,Battery,Dual,Range,B0BYPNXGNY,B015KU2EXU,B015KUITAW

69149P

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69149P, KLEIN TOOLS,Klein Tools,Klein,Tools,69149P,Electrical,Test,Kit,with,Digital,Multimeter,Non-Contact,Voltage,Tester,and,Electrical,Outlet,Tester,Leads,and,Batteries,Multimeter,Kit,B0CTT3RH8R,B09C6MGD7J

RT310

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RT310, Klein Tools,Klein Tools,Klein,Tools,RT310,Outlet,Tester,AFCI,and,GFCI,Receptacle,Tester,for,North,American,AC,Electrical,Outlets,B0CXDFSQ7V,B0BT87LJRL,B07PMDRHXB

Klein Tools manuals from online retailers

Klein Tools ET20 Wi-Fi Borescope Instruction Manual

ET20 • April 10, 2026
Instruction manual for the Klein Tools ET20 Wi-Fi Borescope, featuring a 9 mm 6-foot armored waterproof gooseneck snake, LED lights, and rechargeable battery. Learn setup, operation, maintenance, and…

Klein Tools support FAQ

Common questions about manuals, registration, and support for this brand.

  • Where can I find user manuals for Klein Tools products?

    User manuals are available on the specific product pages of the official Klein Tools website or can be downloaded from our repository.

  • What is the warranty period for Klein Tools products?

    Klein Tools offers a warranty that varies by product type. Hand tools generally carry a lifetime warranty against defects in materials and workmanship, while test and measurement products typically have a 2-year warranty.

  • How do I contact Klein Tools customer service?

    You can contact Klein Tools customer service by phone at 1-800-553-4676 or via email at customerservice@kleintools.com.

  • Are Klein Tools made in the USA?

    The majority of Klein Tools products are manufactured in plants throughout the United States, staying true to their heritage of American manufacturing.