http://www.cncsparetools.com/product/carbide-cnc-wood-lathe-knifes-for-woodturning-cnc-lather-machine.html RicoCNC wood lathe knives are made of top quality solid carbide, widely used for hardwood, semi-hardwood lathing with CNC wood turning lathe machines. Ricocnc lathe knife blade has hardness of 91-91.5 HRC;One pass cutting depth: 1cm. For more inforamtion, please visit our official websites: https://ricocnc.com/ http://www.ricocncparts.com/