Tough-Pen Series

Tough-Pen Series

HLF Tough-Pen series PDC bits are developed to drill through long sections of mudstone, sandstone and shale, in which the bit often encounters siltstone of high abrasiveness and hardness or interbedded layers of high compressive hard shale which is difficult to penetrate through.


Note: HLF can design and manufacture any types and sizes of bits according to customer requirements.



    Chengdu Huilingfeng Diamond Bit Co., Ltd.

    Tel: +86-28-8392 0891

    Fax: +86-28-8392 0830


    Address: Kowloon Road, East Industrial Area, Xindu District, Chengdu, Sichuan, China

    © 2019  Chengdu Huilingfeng Diamond Bit Co., Ltd.   All rights reserved.


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