Snap on wedge wrenches.

[snapmom]

Snap on made a wrench with a wedge shaped end in the early 50s. they are thick at the start of the head and tapper off at the end. The only ones I have seen are dated 1953, but they could be made plus or minus 53. Not rare, and fairly easy to find, just a little odd. Can someone comment on the drill hole on the back of the opening, as to the method of manufacture.
Model numbers are like S2428W. I have only seen three sizes.

[crankshaftdan II]

Snap on made a wrench with a wedge shaped end in the early 50s. they are thick at the start of the head and tapper off at the end. The only ones I have seen are dated 1953, but they could be made plus or minus 53. Not rare, and fairly easy to find, just a little odd. Can someone comment on the drill hole on the back of the opening, as to the method of manufacture.
Model numbers are like S2428W. I have only seen three sizes.

This is just a WAG on the marks in the back of the mouth of wrench--like a part of a milling cutter to center the cut for no wobble on the finish cut??? I think I had one wrench like that and traded it away some time ago?? They arevery neat items!..Cranky

[toolnut]

I believe the hole was added to allow the wrench greater bite on the nut. The hex point of the nut could rest in the hole and the wrench could move forward on the nut. The wedge shape allowed for an angled approach in tight configurations, much like a 15° offset in the handle beam for knuckle clearance, but gives up some of the load bearing surface. Moving closer to the center line of the nut regained some of that bearing surface.

I have no info on the method of manufacture, but it looks milled to me.