Product Name: Machine Plug Tap; Flute Diameter: 0.2 inch (4 mm) (M4); Thread Length: 0.6 inch (16 mm)
Pitch: 0.7mm; Square Head Size: 4 x 4mm (L*W)
Shank diameter: 0.2 inches (5 mm); Total length: 2.2 inches (55 mm)
Color: Silver Tone, Gold Tone; Material: HSS
Weight: 0.4 oz (12 g); Package Contents: 2 x Machine Plug Tap
Tap
Tool for cutting female threads inside the hole
There is a groove like a few male threads in the perimeter of the tool, and a cutting blade is attached
This is an essential tool set for drilling screws in construction and electrical work.