Tap/Die Set, Number of Pieces 16, Thread NC, Size/Range 1/4-3/4 Inch, Tap/Round Die Size 1/4-20, 5/16-18, 3/8-16, 7/16-14, 1/2-13, 5/8-11, 3/4-10 Inch, Type 1 1/2 Inches Outer Diameter Solid, 1/2 Inches Outer Diameter Adjustable, Accessories Straight Tap Wrench and Die Stock, Carbon Steel RestrictionsCalifornia Proposition 65 Warning: This product contains a chemical known to the State of California to cause cancer. Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. Taps and DiesQuickly restore or create internal or external threads in a wide range of sizes. Use on UNC, UNF, NPT, and NPTF threading. Includes threading specialties for tapping drill sizes. Meet American Metal Cutting Institute Standards for cut thread tolerance and ANSI-B94-1987 standards.Fully ground Custom-fit, blow-molded case