Long Arm Hex Key, 5/16-Inch | Klein Tools

Skip to main content

Search

EN

Australia

Brazil

Europe

Germany

Ireland

Korea

Mexico

New Zealand

United Kingdom

Main navigation

Products

New Products

Flame-Resistant Sombrero Hybrid Brim

Step Drill Bit Set, Quick-Release, Straight, Double Fluted, 3-Piece

5/16-Inch Keystone Demolition Driver

Impact Flip Socket Set With Swivel Adapter, 6 Piece

MODbox™ Insulated Tool Kit, 9-Piece

View All New Products

By Category

MODbox™ Mobile Workstation

KNECT™ Driving and Fastening Systems

Bucket Work Center

Bolt Cutters

Battery-Operated Tools

Block & Tackle

Cable Cutters

Chisels, Wedges & Punches

Connecting Devices

Drilling and Holemaking

Hammers

Headlamps and Flashlights

Hex-Key Wrenches

Insulated Hand Tools and Hand Tools Sets

Jobsite Accessories

Knives & Cutting Tools

Levels & Measuring Tools

Lineman Bucket Bags & Accessories

Lineman's Climbing Equipment

Personal Protection & Safety

Pliers

Power Tool Accessories

Saws & Saw Blades

Screwdrivers and Nut Drivers

Sheet Metal Tools (HVAC)

Sockets and Socket Wrenches

Steel Construction Tools

Strippers, Cutters, and Crimpers

Test & Measurement

Tool Bags

Tool Organizers

Tool Kits

Voice / Data / Video Testers

Voice / Data / Video Tools & Connectors

Wire Fish Tape, Fish Rods, and Conduit Tools

Wire Pulling Grips

Wrenches

Branded Collection

Journeyman Series

Replacement Parts

By Industry

Contractor Supply & Jobsite Materials

Steel & Concrete Construction / Iron Worker

HVAC / Refrigeration

Plumbing

Telecom / Low Voltage

Industrial & MRO

Electrical Utility / Line Working

Electrical

View All Industries

Most Popular

MODbox™ Insulated Tool Kit, 9-Piece

14-in-1 Impact Rated Flip Socket Set

Rechargeable Slim-Profile LED Pocket Flashlight with Laser

Grab-And-Go Impact Socket Set, SAE, 10-Piece

Advanced Electrical Circuit Breaker Finder and Wire Tracer Kit and Case

View All Popular Products

Made in USA

Where to Buy

Distributor Locator

Online Retailers

Klein Gear

Media Center

Interactive / PDF Catalogs

Videos

Industry Links

Support

Warranty

Contact Us

Distributor Locator

Partner Support

Replacement Parts

Search

Product Registration

Product Recalls

Battery Tools Warranty/Repair

VoTech Educational Support

About Klein

Companies

Our Mission

American Manufacturing

History

Events

Klein Leadership

Transparency & Coverage

Careers

Careers

Internships

Klein Leadership Program

Long Arm Hex Key, 5/16-Inch

LL20

Long Arm Hex Key, 5/16-Inch

available at the following online retailers

In Stock

$6.99

Shop Now

Shop Now

Products

New Products
By Category
By Industry
Most Popular
Made in USA

Where to Buy

Distributor Locator
Online Retailers
Klein Gear

Media Center

Interactive / PDF Catalogs
Videos
Industry Links

Support

Warranty
Contact Us
Distributor Locator
Partner Support
Replacement Parts
Search
Product Registration
Product Recalls
Battery Tools Warranty/Repair
VoTech Educational Support

About Klein

Companies
Our Mission
American Manufacturing
History
Events
Klein Leadership
Transparency & Coverage

Careers

Careers
Internships
Klein Leadership Program

International

Australia
Brazil
Europe
Germany
Ireland
Korea
Mexico
New Zealand
United Kingdom

The Current - Our Quarterly Catalog Featuring New Products from Klein

The Current - Our Quarterly Catalog Featuring New Products from Klein

Privacy Policy Terms & Conditions Accessibility Contact Us

©2025 Klein Tools, Inc. • All Rights Reserved