Straight Flute Tap:Thread Size: 4#-40 UNC; Thread Length: 18mm / 0.71";Square End Width: 2.5mm / 0.1"; Total Length: 50mm / 1.97"; Accuracy: 2BMaterial: 6542 High Speed Steel (HSS); Cutting Direction: Right HandPackage: 1pcs x Thread Milling TapTwist Drill Bit:Cutting Edge Diameter: 2.2mm / 0.087"; Shank Diameter: 2.2mm / 0.087"Cutting Edge Length: 31mm / 1.22"; Total Length: 57mm / 2.24"; Point Angle: 108 DegreeMaterial: M35 5% Cobalt High Speed Steel (HSS-CO)Package Content: 1pcs x Twist Drill BitDescriptions:Straight flute design, downward chip removal, fast tapping with accuracy. Suitable for processing through holes or shallow holes. For tapping aluminum, die steel, stainless steel, bronze, hard plastics. High-speed steel tool has high hardness and toughness for wear resistance.