Snap on Tool F67B 1/2" Drive Reversible Break Bar Ratcheting Adaptor USA 

fully functional, clean, vintage (early model with patent number) and does have owner nicks on shaft. 

On/Off is same as R and L - reversible

all and all, decent piece that is a must to have!!!  Very handy and heavy duty.

1/2" drive

USA shipping is $6.00   super fast....100% positive feedback....see my other snap on listings!  thanks, oldtoolhunter