... No-spark cutter pick National invention patent Good heat resistance Good corrosion resistance Specifications1. High impact-resistance toughness. 2. Hard wearing 3. ... rock drilling tools ect. Our products include all kinds of round cutter bit,flat cutter bits and holders for ... U76, U82, U84, U85, U92, U94, U95, U118 etc. 2.Replacement of Betek Part No: B47K17H, B47K19H, B47K22H, B43K, B43H, BHR73, ...