Made in USA Old un-used stock – price written on base of shank 12 mm – 1.25, 14 mm – 1.25, 18 mm – 1.50 sizes Product Description Specs Step Reamer for Car Engines for Re-Tapping Spark Plug Holes. 12 mm – 1.25, 14 mm – 1.25, 18 mm – 1.50 sizes. Made in USA Product Step Reamer for Car Engines for Re-Tapping Spark Plug Holes For California Residents: WARNING: Cancer & Reproductive Harm – www.P65Warnings.ca.gov WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood