38mm 5 Tooth Button Bit With Spring Controlled Ball Teeth And 11° Taper Connection For Rock Drilling Henglong 38mm five - tooth button bit with spring - controlled carbide ball teeth and 11° taper shank. Made of YK05 cemented carbide for stable drilling in granite , quarries , tunnels & mine tunneling. Custom specs & bulk supply available. Henglong ’ s premium 38mm five - tooth button bit utilizes spring - controlled carbide ball teeth alongside an 11 - degree taper
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