... approval firstly, thank you! (*^_^*) long masonry drill masonry drill glass drill glass drill bit Super-hard processing of professional, special, non-standard ... 25°), discontinuous cutting and worse part fixture. Conforming to ISO K25, can replace machining of materials like M42, ASP60 ... part fixing and continuous light machining. Corresponding to ISO K10.ASP60C :mported ultra high wear-resistant high- ...