  Ruling Pens Ruling pens, we offer a variety of ruling pens for manual drafting including - Academic 51/2" Oval Nib Ruling Pen with hardened nickel plated steel nib with black plastic handle, the professional 5 1/2" spring blade ruling pen with a hardened nickel plated tool steel nib with spring blade design, and the professional 6" Swedish detail pen single-piece, nickel plated tool with steel nib and black plastic handle.
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