Tap Size:Thread Size: 4-40 UNC; Thread Length: 17mm / 0.67"; Overall Length: 52mm / 2.05"; Square Shank Size: 2.5mm / 0.1"; Tolerance Grade: 2B; Material: High Speed Steel (HSS); Type: Machine TapDie Size:Thread Size: 4-40 UNC; Outside Diameter (OD) : 20mm / 0.79"; Thickness: 5mm / 0.2", Material: Alloy Tool Steel; Type: Round DieThread Size: 6-32 UNC; Thread Length: 19mm / 0.75"; Overall Length: 55mm / 2.17"; Square Shank Size: 3mm / 0.12"; Tolerance Grade: 2B; Material: High Speed Steel (HSS); Type: Machine TapDie Size:Thread Size: 6-32 UNC; Outside Diameter (OD) : 20mm / 0.79"; Thickness: 5mm / 0.2", Material: Alloy Tool Steel; Type: Round DiePackage Included:2 x Tap and Die Set (2 x Machine Tap, 2 x Round Die)Descriptions:1. Compatibility: Suitable for making or repairing male and female threads. Good for general purpose applications.