Batch Processing: The cone knife is a batch processing environment for the chamfering tools.The one-piece design: the chips can be chamfered in the process more conveniently, the case does not clog the tool ergonomics delays. The knife can grind: convenient way to protect it does not need to uninstall the tool. In a single simple step: automatic through hole chamfering both surfaces can be drilled quickly in seconds chamfered edges; excellent. Material: All types of processing can be flexible or a black metal, improving the blade, so that the service life is twice as long.