Socket adapter question ?

[Gort the giant robot]

I keep finding stepdown adapters 5/16 drive down to 1/4 inch drive. Who made a 5/16 drive ? I have 3 now made by major tool markers.


Gort.

 

[Everett]

i never seen one i got kit from sears craftsmen , 1/4 and 1/2 and 3/8 set 3/8 drive, is for what drive

 

[cowboy73]

Snap-On made 5/16" drive ratchets and sockets a long time ago. And Blackhawk had a 7/16" drive back in the day. They dropped these and went with the standard 1/4" and 3/8" respectively. There were probably other companies making these but these are the ones I know off the top of my head.

 

[Gort the giant robot]

What I find odd is in 40 years of buying, using and collecting old tools thease are the only 5/16 drive tools I have ever seen. The most common odd drive size I have come across is tools in 9/32 drive. Plomb and Snap-On being the most common found in this size. Thank you for your answers.


Gort.