In the process of 3D printer DIY, it is inevitable that there will be burrs in metal parts or plastic parts. These burrs can be easily handled with a trimming knife and are safe and reliable, so it is not easy to hurt your own hands. High surface quality: Compared with the use of grinding wheels or other deburring tools, the machining surface has high smoothness because the tool uses sharp cutting edges for cutting. ?????????: ??????, ??????, ????????????, ????????????, ????, ??????? ?????, ????: ?????????, ?????????, ??????????????????????PLA/PETG/ABS/???/PEI/PEEK) ??: 1 ??????? + 10 ????1 ?)