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Ko-ken Tool Co., Ltd.

Cutting Pliers


Torque Wrench

Spanna & Hex Wrench

Soft Touch Pliers


Evolution of Automotive service Lineup
Reversible Ratchet
Short Standard
Flex short Flex standard
Compact Flex compact
Hinge Handle 250mm
Extension bar
75mm 125mm 250mm
Universal joint
Quick spinner
Extension adapter
6-point Socket
Spark Pulg Socket
Bit socket
Reversible Ratchet
Standard Flex
Extension bar
50mm 100mm 150mm
Universal joint
Quick spinner
Quick spinner adapter
6-point SocketBit socket
Reversible Ratchet
Extension bar
125mm 250mm
Universal joint
Quick spinner
Hinge Handle 430mm
6-point Socket
Ko-ken Tool Co., Ltd. Z-series(Z-EAL)

Ko-ken 3726Z Z-series 3/8"(9.5mm)sq. Flexible Ratchet, Reversible Length=178mm

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Original Price $ 86.46 Details
$ 53.53 (¥ 5,990)
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Product Information

Evolution of Automotive service Lineup


TOLERANCE-Square Drive
Manufacturing tolerance of Male and Female
Square are precisely controlled to achieve a
more secure fit between Socket and Handle.

Original Ball Holding system is applied on
This mechanism gives secure connection
between Socket and Handle.


Smaller head with 36 tooth gear and light ratchet
movement allow working in narrow space and
confined areas.


2400MZ and 3400MZ are designed 5-9mm shorter
than standard 2400M and 3400M. Ideal for
working in confined and tight areas.

Ko-ken standard sockets are manufactured
according to DIN/ISO standards. The tolerances of
2400MZ, 2300MZ, 3400MZ and 3300MZ sockets
are precisely controlled to achieve a more positive
fit between bolt and socket.

Latest Product Reviews (4)

Posted by CK**** , 2015/02/24 12:45:22
うたい文句通りのギアの軽さ、かといって惰弱でもなく、きっちりトルクはかかる、それでいて、だいぶ緩んだ状態でもラチェッティング出来るほどの空転トルクの軽さ。ウホッ、いいラチェット、です。 首振りは便利、一応センタークリックはありますが、ロックがあればなおいいかも、と思った次第。四の五の言わずノーマルもそろえちゃいましょう、な価格、でもありますが。
Posted by マキ**** , 2015/01/28 08:40:09
想像よりしっかりしていました。工研のラチェットは使用していますが、Z-EALは今回が初めてになります。空転トルクは通常モデルと少し味付けが違いますが、やはり工研です こだわりが感じられます。値段も安く想像よりも丈夫そうです。エラストマ樹脂のハンドルは、MOKIナイフさん等のハンドルにも使用されていますが使用感は非常に良いです(柔らかい感じの手触り)。はじめは重いかな?と思いましたが、重量バランスがいいのか?使いやすいです。この値段でこの精度、工研さんは面白い企業ですね。ショップさんの配送の梱包もエコで無駄なく好感が持てます。
Posted by コウ****** , 2014/07/28 08:25:29
Z-EALシリーズいいですね。スタンダードのラチェットに加え 首振りも欲しくなり今回購入しました。空転トルクにばらつき?があるのか 新品だからなのか? ギアのカチカチ感が大きかった気が… そのうち馴染みますよね? これからどんどん使用したいと思います。

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