drag bits

Specifications 33/4", 3.7/8", 4", 41/4", 55/8 ", 47/8", 6", 7.3/8", 4.3/4" etc. drag bits are available. Good performance 4.1/2", 4.3/4", 5.1/8", 5.5/8", 5.7/8", 6.1/4", 6.3/4", 6.5/8" 7.3/8" 9.7/8",11.1/2" etc. drag bits are avaiable TC drag bits 1. Drag bits are made according to API standard or NROD thread standard or others. 2. Various st TC drag bits 1. Drag bits are made according to API sta