Craftsman 19 Pc. Tap and Die Set 952341 10" taps: 1/4-20, 5/16-18, 3/8-16 NC; 1/4-28, 5/16-24, 3/8-24 NF; 6-32, 8-32, 10-24 and 10-32 Hardened precision ground and polished carbon steel make chip removal easy 6" dies: 1/4-20, 5/16-18, 3/8-16 NC; 1/4-28, 5/16-24 and 3/8-24 NF Includes: T-handle, 1" die stock and 1-0-1/4" T-handle For cutting and renewing internal and external threads