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  1. W

    Help me date these ancient ARMSTRONG wrenches and check out the box they came in.

    I think the set is probably British Standard Whitworth: 7/8 BSW = 1.48" and 3/4 BSW is 1.30". That is a very nice old box though! EDIT: This was where I was pulling those numbers from http://www.oldengine.org/members/diesel/Tables/WhitAF.htm
  2. W

    Bench Grinder Wheel Quality

    Both of those wheels are for angle grinders, not bench grinders. Are you looking to sharpen your mower blades on a bench grinder?
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