Drag bits,step drag bits 
Leading manufacture of varies tugsten carbide(TC)stepped drag bits,such as 2-wings drag bit,3-wings drag bit,4-wings etc. 
With ISO certificate &quality control

Product Feature
Stepped drag bit is a drill bit uses in soft formations such as sand,clay or some soft rock. 
Type: Chevron and Step type 
Wings: 2, 3 and 4 wings 
Size: " to 24" 
Thread: 2 3/8", 3 1/2", 4 1/2", 6 5/8" API Reg. Pin 
Type: Chevron and Step type 
Wings: 2, 3 and 4 wings 
Size: 3" to 24" 
Thread: 2 3/8, 3 1/2, 4 1/2, 5 1/2, 6 5/8 API Reg. Pin