Parlec S10-10TT4C Tapping Heads; Shank Type: Straight Shank; Shank Diameter (Inch): 1; Minimum Tap Capacity (mm): M1.4; Minimum Tap Capacity (Inch): #0; Maximum Aluminum Tap Capacity (mm): M14; Maximum Aluminum Tap Capacity (Inch): 9/16; Maximum Mild