Tapmatic RX 30 Self-Reversing Tapping Head, 5/8"-16 Thread Mount, #0 - 1/4" and M1.4-M7 Capacity For hard to machine material and high torque applications like roll form tapping Less tap breakage due to pre-selective torque control Reduced cycle time through increased 1.75 :1 reverse speed Easy handling, compact design Easy adaptation with multiple interchangeable arbors