sales@unikelly.com +8613647327093 (whatsapp)
Unidrill not only provides customerized service but high-quality materials are also valued by us. 30CrMnTi is used for our gibs, with the hardness of 48-55HRC, while most other suppliers in the market use 20CrMnTi, which is softer. UNIDRILL Kelly Bars have the features of high drilling efficiency and High hardness, which are highly praised by our customers. Customer satisfaction is our greatest happiness.