Reviewed By: I.Ball
Category: Old Rules
Manufacturer: Chesterman
Tool Type: Key Seat Rule
Model No: 802
The Chesterman rule number 802 is referred to as a box square or key
seat rule.
The rule was made by Chesterman, Sheffield, England.
The Chesterman 802 key seat rule is designed to mark lines onto a cylindrical
surface.
The 802 is marked out in inches with 1/32" increments.
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