Knife blade spanner wrench

Details Knife blade spanner wrench Knife blade spanner wrench

1987-09-24

1989-09-05

Watts, Douglas D.

Compound tools

Pocketknife type

7138, 7168, 30355, 81 305, 811761, B26B 1100

Patent

active

048625442

ABSTRACT:
A knife blade suitable for use as a spanner wrench in the installation and removal of choke tubes in shotguns, characterized by recesses on one edge, preferably matching the diameters of 12 and 20 gauge shotguns.

REFERENCES:
patent: 149806 (1874-04-01), Swan
patent: 613693 (1898-11-01), Martin
patent: 673609 (1901-05-01), Sullivan
patent: 961515 (1910-06-01), Montgomery
patent: 1115780 (1914-11-01), Champlin
patent: 4648145 (1987-03-01), Miceli

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