Neiko 00914AA Tap and Die Set Sea Alloy Steel (40 Piece) Cuts and renew internal and external coarse and fine threads with ease and precision to exact standards Professional grade, alloy steel construction withstands heavy duty operation and prolongs service life Wide diameters include specific tap/die sizes: 10 UNC dies size: 1/4-20, 5/16-18, 3/8-16, 7/16-14, 1/2-13, 9/16-12, 5/8-11, 3/4-10, 7/8-9,1-8 10 UNC taps size: 1/4-20, 5/16-18, 3/8-16, 7/16-14, 1/2-13, 9/16-12, 5/8-11, 3/4-10, 7/8-9,1-8 Large set comes in 45 pieces including: 20 pcs Tap & 20pcs Die, 1- Die Stock Handle Wrench, 1- Adj Tap Handle Wrench, 1- T Hdl Tap Wrench, 1- Die Adaptor, 1-Stubby Screwdriver Convenient hard plastic storage case packs all material together for portability, organization, and protection