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That extra lead diameter means fewer sharpening interruptions during extended sessions and more consistent coverage across large tonal areas
the paper withstands repeated layering
coloring agents
no ghost marks
Precision Aluminum T-Square Clearance That extra lead diameter meansArchitectural drafting and technical illustration demand tools that maintain accuracy through thousands of measurements and countless edge guided cuts. Ludwig Precision T Squares deliver exactly that reliability. Hard tempered aluminum blades resist warping and flexing under pressure, while secure riveting, four rivets on standard models, five on heavy duty versions, eliminates the wobble that ruins precise work. The calibration system addresses real