Union Butterfield Straight Flute Hand Tap, General Purpose, Series: 1500L, Measurement System: Imperial, UNC, 7/8-9, Plug Chamfer, 4 Flutes, HSS, Bright, Class of Fit: 3B, Left Hand Cutting, 2-7/32 in Thread Length, 4-11/16 in Overall Length, 0.697 in Shank Dia, Steel, Stainless Steel, Copper, Titanium, Nickel, Cast Iron, Aluminum Magnesium and Synthetic Materials Material Application, H4 Thread Limit