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Made in USA - Porting Tool: 0.848" Spotface Dia, 1/4" Tube OD, Plain, 7/16-2" Port - 00390260 - MSC Industrial Supply
CC Specialty Tools - 1082SR ready for Porting and Polishing 2 stroke cylinders http://www.ccspecialtytoolstore.com/2-stroke-cylinder-porting-kit-p/1082srkit.htm | Facebook
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Scientific Cutting Tools - Porting Tool: 0.682" Spotface Dia, 1/8" Tube OD, Plain, Tube Dash #2 - 57198426 - MSC Industrial Supply
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