The Pin-Pin adapter is made of quality alloy material, to adjust the female thread of drag bit to different thread of drill rods.

The Pin-Box transfering adapet is made of high quality alloy material, to adjust the drag bit to the suitable drill rods. 

The diameter 6 1/2" 4 wings step type drag bit is made of quality tungsten carbides, with API PIN REG 2 7/8" connection thread.

The 2 7/8" inches 3  wings step type drag bit is made of quality tungsten carbides, with N male connection thread.

The 3 wings tungsten drag bit is made of quality TC material, with step type carbides. 

The 4 wings V type drag bits are made of quality tungsten blades, with API REG PIN 2 3/8" connection thread.