... invention patent Good heat resistance Good corrosion resistance Specifications1. High impact-resistance toughness. 2. Hard wearing 3. Good quality&Low ... cutter bit,flat cutter bits and holders for excavate coal machine,foundation,solid wall etc.our products are replacements of ... , U85, U92, U94, U95, U118 etc. 2.Replacement of Betek Part No: B47K17H, B47K19H, B47K22H, B43K, B43H, BHR73, BHR96, BSK12, ...