Working on machines over time inevitably leads to the acquisition of needed tools. At first it is general tools which have a wide variety of uses such as a metric socket set, and wrenches. However, I was looking around the garage the other day, and I was suddenly surprised at how many special tools were laying around. Some pegboard had several special tools for machines I no longer owned. Others were for that one time when I needed to get to the one bolt that was inaccessible by using a conventional tool. A few of the toolbox draws had special variations as well. As usual, I thought that I should categorize the tools that are beyond the basic necessities, and why I needed them.
Special Sizes. This category contains my Whitworth wrenches. I can blame a few Norton motorcycles for these tools, which caused the need for both sockets and spanners. The bikes are gone, but the tools remain. A massive 26mm wrench is also in this category. I can't even remember why I needed this. Lastly, I can add a few large standard sockets such as 1 1/16 used for steering nuts that are actually metric! Lastly, I need to add the five-point and other "star" wrenches that BMW has forced me to acquire. I am not sure what was wrong with allen head hardware, but there you have it.
Special Access. In this group, I include the deep metric sockets that I have, some of which are in 3/8" and others in 1/2" drive. By the way, shouldn't metric sockets have metric drives ? This mixture of 3/8" drive, and 17mm socket seems somehow incongruent. But I digest....Also present here are swivel socket extensions, super long screwdrivers, and drum brake adjusters. And I can't forget miniature ratcheting screwdrivers and thin spanners, and circlip pliers.
Specific Jobs. If you need to keep the alternator fan pulley stationary while you loosen the nut on a Porsche engine, you need the wrench made for that job. You need half a day and a troupe of contortionists to get this done without it. You cannot loosen the oil filter on the newer BMW R1200 bikes without the filter wrench made for the cavity it lives in. Ever try to replace the clutch on a 911 without the alignment tool ? Ever try to remove a reluctant finned exhaust nut on a Norton, or on a BMW /2 or /5 ? Ever try to convince a ball joint to separate from its' control arm without a pickle fork ?
I Made It. I have a number of wrenches, screwdrivers, and other instruments that I have bent, twisted, amputated, or otherwise altered so that they could perform a specific function, or fit in a specific space. I also have some soldered wiring pigtials, 6v test lights, a wooden front fork stand, pieces of axles used to drive out other axles, old bearings to seat new bearings, etc, etc, etc.
If you have ever spent hours doing something that would have taken a few minutes with the right tool, you can appreciate the need for some investment of your time or money to avoid doing that again. You often grimace at the cost of some piece of metal or plastic that you know you will only need once in a while, but when you are in the moment of need, the right tool is priceless.