Tap Size:Thread Size: 1/4"-28 UNF; Thread Length: 28mm / 1.1"; Overall Length: 73mm / 2.87"; Square Shank Size: 5mm / 0.2"; Tolerance Grade: 2B; Material: High Speed Steel (HSS); Type: Machine TapDie Size:Thread Size: 1/4"-28 UNF; Outside Diameter (OD) : 20mm / 0.79"; Thickness: 7mm / 0.28", Material: Alloy Tool Steel; Type: Round DiePackage Included:1 x Tap and Die Set (1 x Machine Tap, 1 x Round Die)Descriptions:1. Compatibility: Suitable for making or repairing male and female threads. Good for general purpose applications. Tap and die are both right hand thread.2. Application: Used for through hole processing, such as alloy steel , die steel, cast iron, ferrous and non-ferrous materials etc.. Great for maintenance and repair work.3. Features: High speed steel (HSS) tool provides high hardness and good wear-resistance.