Snap on No. B3408
The B3408. Lineman's ratchet, or Scaffold Ratchet. I do not know to much about this ratchet. I know it was made from at least the 50's thru 70's. This one has a 77 code. Some have a large flat selector switch to use with gloves. Some have the regular one (could have been changed). Has a B3409 socket 7/8, the socket opening on the end of the rat is also 7/8, this points more to a scaffold rat. Has a locking pin to hold the socket. Hard to find.