Williams Deep socket mystery

[CMB41]

Just purchased this Williams metric deep socket set MSBD-19HRC. 19 pieces. 6mm to 25mm. It jumps from 20 to 22. No 21mm included.

The 21mm deep 6 point does not exist in the Williams catalog, which I find quite odd. Anyone with a clue why this might be? Thanks

 

[ohhimark]

That is weird, especially since they include a 20mm. The shallow set includes the 21mm. Believe it or not, there's even a 5 year old thread (with no solid conclusion) about this: https://www.garagejournal.com/forum/threads/why-no-williams-bmd-621.457567/

Snap On has their version: https://shop.snapon.com/product/Dee...t-Metric-21-mm-Flank-Drive-Deep-Socket/SFSM21

 

[CMB41]

That is weird, especially since they include a 20mm. The shallow set includes the 21mm. Believe it or not, there's even a 5 year old thread (with no solid conclusion) about this: https://www.garagejournal.com/forum/threads/why-no-williams-bmd-621.457567/

Snap On has their version: https://shop.snapon.com/product/Deep,-mm,-Chrome-(3-8")/3-8"-Drive-6-Point-Metric-21-mm-Flank-Drive-Deep-Socket/SFSM21

Thanks for the link. I did search before posting but I obviously didn’t do it correctly!
I‘m going to call them later today and see what they have to say

 

[WillyBoy]

21 mm is almost exactly 13/16 inch. Perhaps they're saving production costs by having you buy another socket.

 

[WWheeler]

Looks like they make a 12pt

Williams 1/2" Drive 21mm Deep Socket, 12 Point USA Made
Condition: New
$10.99

Pardon Our Interruption...

 

[CMB41]

Looks like they make a 12pt

Williams 1/2" Drive 21mm Deep Socket, 12 Point USA Made
Condition: New
$10.99

Pardon Our Interruption...

Thanks. Yes, I did see that. All the more reason why I don’t understand why they omit it from the 3/8 drive 6 point set?!! I called Williams and left a message today. The wait begins….

 

[KnurledNut]

They make a 21mm 3/8 impact socket. Just need a can of chrome paint.
Part #JHW12M-621