Ok, Mrs J is watching people being murdered on the TV again so I wondered if I could find it and there it was, top spanner in my "miscellaneous orphans" drawer. No it's not a Superslim, even better, it's a "proper" Britool! At the time, and for a few years after, probably the highest quality tool in my old cantilever box! Here it is:
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Actually I find an imperial spanner, especially a ring spanner or socket, is often a useful fit on a corroded or damaged metric one of similar size as it's actually just a tad smaller. I set it up on an 8mm bolt - so 13mm hex head just to illustrate. Imperial spanner on the left:
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However just to educate our younger brethren, Here, below, is the first brake spanner set I bought - probably late 60's? You'll notice they are Williams Superslims. Great tools in my opinion, they've taken a lot of abuse over the years and still work almost like when they were new:
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There's two flare (tube) nut spanners at the top then a spanner for turning the square manual adjusters that were so prevalent on drum front brakes and before auto adjusters became standard on rear drums. The bottom one was a special spanner for Minis. The top adjuster on the front brakes was difficult to access with a standard tool like the one above it so they made a special open ender. It wasn't always the perfect solution because they suffered badly from corrosion which seized them up and then people would round them off. Many other common vehicles suffered the same problem and there was a whole industry based around replacement adjuster sets which bolted into place - if you could get the old one out without damaging the back plate. The small hex on the other end fitted the bleed nipples. As you can see they too were "mini sized" - about half the diameter of current types - and were notorious for snapping off!
Stay safe all
Jock