180mm (7 Inch) Depressed-Center Grinding Disc B&H TOOLS CO., LTD. , https://www.bandhtools.com The chicken heart chuck is generally divided into two types: straight tail type and curved tail type. In practice, we designed a new dual-purpose hinge type lever chicken core chuck as shown in Fig. 1, which can be used as a straight tail. Can be used as a tail, very convenient to use, is now introduced as follows: First, the chuck structure This chicken heart chuck is composed of clip specific 1 and the lever 6