What is this Koken accessory used for?!

Archived from the Tools In Action forum (Accessories). This thread is read-only.

AltanMember since Nov 2011

Photo from the original forum

winglessMember since Nov 2017

Maybe to calibrate torque?

AltanMember since Nov 2011

wingless wrote:

On 3/23/2025 at 12:30 PM, wingless said:

Maybe to calibrate torque?

 

I don’t think so, one end is Western 1/4″ E6.3 hex shank (3/8″ or 9.5mm) and the other end is Japanese 6.35 hex shank (14mm), must have some strange special use I believe. 

JronmanMember since May 2016

No idea. Ko-Ken stuff is great though. I picked up some of their extended reach spark plug sockets. Could just be for installing 1/4 inch hex screws but compatible with either hex standard. 

AltanMember since Nov 2011

Jronman wrote:

2 hours ago, Jronman said:

No idea. Ko-Ken stuff is great though. I picked up some of their extended reach spark plug sockets. Could just be for installing 1/4 inch hex screws but compatible with either hex standard. 

 

They have another version of this which both ends are 14mm long (Japanese 6.35 hex shank) 

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