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TM has mentioned before — but I’ve had the General 141ME for at least a couple of years, and have found it especially handy lately while doing some volunteer work setting up a search-and-rescue (SAR) van. It’s only 4″ long, made of fiberglass-reinforced plastic, can measure up to 3″ inner or outer diameters with its caliper, and has both metric and English readings.

I have used it to check what size u-bolts I need to clamp a bracket to existing tubing, confirm hole diameters so I can get cables through, and determine screw lengths for a locking clasp on an exterior door. It fits easily in my pocket, so it travels with me on the multiple trips I’ve been making to various hardware stores to pick up all the things we don’t seem to have in the barn where the SAR van is stored.

The $6–$7 price and small size have made it a worthwhile addition to my traveling tool kit. What’s your favorite — and handy — method/tool for diameter measurements?

General [Manufacturer’s Site]
Street Pricing [Google Products]
Via Amazon [What’s This?]

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2 Responses to General 141ME Plastic Calipers

  1. Tom327Cat says:

    I keep one with me at work (as an electrician). While the other guys are left guessing about wire gage, drill bit diameters or bolt sizes, I have the answer fast.

  2. David Bryan says:

    Tom, you’ll wake up with those calibrated eyeballs before long. Something that’s useful to me is knowing how long my fingers are (the ones I can still straighten out anyway). I can estimate a lot of measurements pretty close like that. If I leave my fingers at home I’m taking the day off anyway.

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