Tubing miter shear - GIF

Tubing miter shear.

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Previously:

https://www.homemadetools.net/forum/...186#post168978
https://www.homemadetools.net/forum/...577#post174159
https://www.homemadetools.net/forum/...432#post127452
https://www.homemadetools.net/forum/...8350#post87318

Not only shear, but the operation begins with 'lancing' aka 'piercing', but that implication is completely through; initiated by punch, completed with die.