Class B Jade Carving Diamond Grinding Head / B Needle Round Head Cone Inverted Horn Head / Jadeite Grinding and Polishing Needle
https://www.vogueparade.com/shopping/EN/1428/1/1005003242150281/class-b-jade-carving-diamond-grinding-head-b-needle-round-head-cone-inverted-horn-head-jadeite-grinding-and-polishing-needle//