Stainless steel trimming tools hand made by Hsin-Chuen Lin. With stainless steel, these tool set stay sharp longer, clean up easier and are rust free. Resharpening instruction: If you don't have a power bench grinder, you can use a fine diamond file or a sand paper filing/sanding the inner part of the tools, and you should be able to keep the tools sharp again. Please watch the following sharpening videos on YouTube: https://www.youtube.com/watch?v=pMHHoLRgxFA&t=157s https://m.youtube.com/watch?v=Qil2vIoQq2o Please watch the videos on how to use the stainless steel tools for trimming and creating chattering texture. #1 https://www.youtube.com/watch?v=v1rYVlnYdIY #2,#7 https://www.youtube.com/watch?v=xB1Sa7jsnwo&t=615s #3 https://www.youtube.com/watch?v=TocJjmxi5-I #4,#5,#6 https://www.youtube.com/watch?v=nYiDa5XCCxM #10 https://www.youtube.com/watch?v=lT_YYQxFq2Q