Hand Tap:Thread Size: M12 x 1.25 (Right Hand); Square Shank Width: 7mm / 0.28"; Thread Length: 32mm / 1.26"; Total Length: 73mm / 2.87"; Accuracy: H2; Number of Flutes: 4 Straight FlutesRound Die:Thread Size: M12 x 1.25 (Right Hand); Outside Diameter: 38mm / 1.5", Thickness: 10mm / 0.39"Package Content: 1pcs x Taper Tap, 1pcs x Bottom Tap, 1pcs x Round DieDescriptions:9SiCr alloy tool steel tap and die set offers excellent hardness, toughness and wear resistance for durability. Uncoated thread tap & round die provide good cutting performance, great for threading a wide range of applications.Taper Tap: Start the thread and guide it into the workpiece, commonly used when tapping through holes. Bottom Tap: Generate threads close to the bottom of a blind hole.