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Long-Arm Hex Key, 4 mm
LLM4 - spec sheet
Warnings
- Always wear approved eye protection.
- NOT insulated. Will NOT protect against electrical shock.
- Do NOT use a pipe or similar extension to increase leverage.
Features
- Klein offers a lifetime warranty on material defects and workmanship for the normal life of the product
- Short Arm Length - 11/16-Inch. Long Arm Length - 3-31/32-Inch. Hex Size - 4mm
- Weight - 0.03 pounds
- Made in USA
- Hex Key with rust and corrosion resistant surfaces
LLM4 - spec sheet
Manufacturer Resources
Product Specs
- Hex Size:
- 4 mm
- Item Depth:
- 3.6000 in
- Item Height:
- 0.1130 in
- Item Weight:
- 0.0300 lbs
- Item Width:
- 0.7880 in
- Long Arm Length:
- 4.5" (11.4 cm)
- Short Arm Length:
- 1" (2.5 cm)
- Department:
- Electrical
- Product Group:
- Hand Tools
- Product Subgroup:
- Hammers & Wrenches
- Product Weight:
- 0.48 oz (13.6 g)
- Product Type:
- Hex Key
Klein Tools LLM4 – Frequently Asked Questions
1) Is the Klein LLM4 hex key metric or SAE?
Metric. The LLM4 is a 4 mm hex key, so it fits 4 mm socket-head fasteners only. If your set screws are inch sized (1/8, 5/32, 3/16 and so on), a 4 mm key will either not enter or will round the socket. Check the fastener before you turn it.
2) Can I use the Klein LLM4 hex key on live electrical work?
No. The LLM4 is not insulated and will not protect against electrical shock, so it must not be used on energized parts. De-energize and verify before working. For live work you need a tool rated and marked as insulated. Approved eye protection should be worn either way.
3) Does the LLM4 come as a single key or as part of a hex key set?
Single tool. The LLM4 is one 4 mm long-arm hex key, ordered by model LLM4. If you need a range of metric sizes you will have to order each size separately or buy a set.
4) Why choose a long-arm hex key instead of a standard short one?
The long arm gives you reach into recessed or obstructed fastener locations, such as set screws down inside a housing, behind trim, or in a deep panel opening, and the extra length gives more comfortable turning leverage by hand. A standard stubby key is better where there is no room to swing the long leg. Do not add a pipe or similar extension to a hex key to increase leverage.
5) Will the Klein LLM4 hex key rust if it lives in a damp tool bag or truck?
The LLM4 has rust and corrosion resistant surfaces, which holds up to the damp bags and job boxes these keys usually live in. It is also made in the USA.
6) How small and light is the Klein LLM4 4 mm hex key for carrying on a service belt?
It weighs 0.48 oz (13.6 g), about 0.03 pounds, and measures 3.6 x 0.788 x 0.113 inches, so it drops into a pouch or shirt pocket without being noticed on a service call.
How fast can I get the Klein Tools LLM4 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 LLM4 come with a warranty?
Absolutely. The Klein Tools LLM4 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 LLM4?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools LLM4 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.