Our products have approved ISO9001:2000 Quality System and inspection of

National Rock Drilling Tools Inspection Center. All the products have assured

by China People Insurance Company. Integral Drill Rod Manufacturer &

Supplier, with advanced technology & competitive price.

a) Raw materials: 55 SiMnMo, 95CrMo

b) Shank sizes: i) H22 x 108mm (7/8 x 4-1/4 ) ii) H25 x 108mm (1 x 4-1/4 )

c) Length under collar (mm): 400, 800, 1200, 1600, 2000, 2400, 3200, 4000, 4800

d) Bit diameter (mm): 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41