Ko-ken Tools 1 in Square Drive 6-Point Socket, 51mm - 8400M-51
SKU: 56539661158

Ko-ken Tools 1 in Square Drive 6-Point Socket, 51mm - 8400M-51

$68.02 $75.58
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Description

Ko-ken Tools 1 in Square Drive 6-Point Socket, 51mm - 8400M-51Ko ken Tools 1 in Square Drive 6 Point Socket, 51mm 8400M 51 Koken 1 inch square drive 6 point socket in 51 mm is built to support high torque fastening tasks in automotive, industrial, and heavy equipment service environments. Produced to strict dimensional tolerances, this socket delivers consistent and accurate engagement with metric fasteners, helping maintain controlled torque transfer during tightening and removal. The 6 point profile applies

Ko-ken Tools 1 in Square Drive 6-Point Socket, 51mm - 8400M-51

Koken 1 inch square drive 6 point socket in 51 mm is built to support high torque fastening tasks in automotive, industrial, and heavy equipment service environments. Produced to strict dimensional tolerances, this socket delivers consistent and accurate engagement with metric fasteners, helping maintain controlled torque transfer during tightening and removal. The 6 point profile applies force to the flat sides of the fastener, supporting secure contact under load and helping minimize rounding during repeated use. Carefully balanced wall thickness provides the strength needed for demanding applications while maintaining a practical outer diameter for use with professional tool systems. Koken's precision machining processes and rigorous quality control standards contribute to dependable long term performance and resistance to wear under continuous high load conditions. The accurately machined drive end ensures stable connection with 1 inch square drive ratchets, extensions, and torque tools, while the refined surface finish supports corrosion resistance and straightforward cleaning, reflecting the professional craftsmanship associated with Koken.

Specifications:

  • Drive Shape: Square
  • H Size: 36mm
  • Input Drive Size: 1 in
  • Length: 70mm
  • Opening: 6-Point
  • Output Size: 51mm
  • D1 Size: 75.3mm
  • D2 Size: 66mm
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 56539661158

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4.4 ★★★★★
Based on 2230 reviews
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Product Reviews
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Verified Purchase
Red-Dog
Massapequa, US
★★★★★ 5
Great product
Item Package Quantity: 1
This product works awesome. Fast and easy. Customer service is to work with as well. Yes, I recommend this product. Head lights look better and visibility greatly improved.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 29, 2026
R
Verified Purchase
Rick Rivera
Boise, US
★★★★★ 4
Immediate results
Item Package Quantity: 1
Very easy to apply. Impressive immediate results. However not yet sure if the shine will last. It’s only been 48 hours but so far it’s great and definitely worth the money. I give it 4 stars for now. If the shine lasts it deserves 5 stars.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
S
Verified Purchase
S. Jack
Omaha, US
★★★★★ 3
Good…not great
Item Package Quantity: 1
Worked decently. Took care of the light fog but didn’t quite do the job on the center of the lights
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 26, 2026
P
Verified Purchase
PhotoGraphics
Houston, US
★★★★★ 5
It does work but
Item Package Quantity: 1, Item Package Quantity: 1
I recently bought a small general purpose utility vehicle. Because it was a tow along vehicle behind a motorhome since it was new it is in remarkable condition. That is except for the headlights. They actually aren’t yellowed with age but cloudy from exhaust fumes from the motorhome. Such a haze is hardened and doesn’t even scratch with a fingernail so I had very low expectations for this vehicle. WHAT YOU GET I looked at the listings for all of the famous brands, I chose this one primarily on price, after all I only bought this vehicle for quick errands around the neighborhood. I accept responsibility for not reading every word of their ad, but because I have used many well-known brands of headlight restorer in the past I know that most of them have enough so you can do a couple of vehicles at least. So I was completely not expecting getting three small packets of wipes. That’s it. It can be used only one time and now compared to the kits with bottles that can do several sets of headlights that cost twice as much I see this one is a not such a good value as I thought. And I never buy anything that comes as a wipe, usually by the time I get them they are already dried up, which makes them useless, that’s why they always have an expiration date. I changed my plans and went to work on the Jeep immediately to see if I could make those headlight lens covers usable (they look like sealed beams but the lenses are meant to protect the headlamps). YES NO MAYBE I can’t blame the ad, after reading it again they do state that these are only single use wipes, which means if you start a project you have to finish immediately. Hint: never use wipes on a hot day, they will start drying up as soon as you open the envelope and if the day is hot enough you might not even get through the job before they are totally dry. If I knew how these differed from the well-known brand names I would have made the choice to buy something in a bottle so I can use a real cleaning cloth and re-wet it if necessary. Did these clean my headlamp lenses? As a shopper all you want to know is yes or know, did it work and am I satisfied. The conclusion is they exceeded my expectations. The application process could not be easier, and note that well when some random person approaches you at a gas station and offers to clean your headlights, these are so easy my great-grandmother could apply them. You wipe the lenses with envelope #1, not rub, not scrub, just a simple wipe to make sure you get all of it. I was able to also do my clear lens fog lights which were equally crusted over. Make sure you dry them with a paper towel then let them air dry for a little while. I’m not sure what you would do if you live in an extremely high humidity area, and the manufacturer doesn’t address that. It was a dry day for me so I gave it fifteen minutes. Then you wipe the entire lens with packet #2 – again I was able to do two headlights and two fog lights with one swab. My headlight and fog lenses instantly turned crystal clear like they looked the day the car was made. I should take away a point because I didn’t expect this kit to be only three small envelopes with wet wipes in them but they don’t try to pretend otherwise and results are 100% of why I rated them a full five stars.
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Reviewed in the United States on October 16, 2024
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Verified Purchase
Dolores DelGuercio
Omaha, US
★★★★★ 5
Good quality
Item Package Quantity: 1
My car is old this product does a very good job.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026

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